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Implement ALTER TABLE ... SPLIT PARTITION ... command 

This new DDL command splits a single partition into several parititions.
Just like ALTER TABLE ... MERGE PARTITIONS ... command, new patitions are
created using createPartitionTable() function with parent partition as the
template.

This commit comprises quite naive implementation which works in single process
and holds the ACCESS EXCLUSIVE LOCK on the parent table during all the
operations including the tuple routing.  This is why this new DDL command
can't be recommended for large partitioned tables under a high load.  However,
this implementation come in handy in certain cases even as is.
Also, it could be used as a foundation for future implementations with lesser
locking and possibly parallel.

Discussion: https://postgr.es/m/c73a1746-0cd0-6bdd-6b23-3ae0b7c0c582%40postgrespro.ru
Author: Dmitry Koval
Reviewed-by: Matthias van de Meent, Laurenz Albe, Zhihong Yu, Justin Pryzby
Reviewed-by: Alvaro Herrera, Robert Haas, Stephane Tachoires
This commit is contained in:
Alexander Korotkov 2024-04-07 00:58:09 +03:00
parent 1adf16b8fb
commit 87c21bb941
19 changed files with 3766 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
doc/src/sgml/ddl.sgml
View File

@ -4400,6 +4400,25 @@ ALTER TABLE measurement
measurement_y2006m03) INTO measurement_y2006q1;
</programlisting>
</para>
<para>
Similarly to merging multiple table partitions, there is an option for
splitting a single partition into multiple using the
<link linkend="sql-altertable-split-partition"><command>ALTER TABLE ... SPLIT PARTITION</command></link>.
This feature could come in handy when one partition grows too big
and needs to be split into multiple. It's important to note that
this operation is not supported for hash-partitioned tables and acquires
an <literal>ACCESS EXCLUSIVE</literal> lock, which could impact high-load
systems due to the lock's restrictive nature. For example, we can split
the quarter partition back to monthly partitions:
<programlisting>
ALTER TABLE measurement SPLIT PARTITION measurement_y2006q1 INTO
(PARTITION measurement_y2006m01 FOR VALUES FROM ('2006-01-01') TO ('2006-02-01'),
PARTITION measurement_y2006m02 FOR VALUES FROM ('2006-02-01') TO ('2006-03-01'),
PARTITION measurement_y2006m03 FOR VALUES FROM ('2006-03-01') TO ('2006-04-01'));
</programlisting>
</para>
</sect3>
<sect3 id="ddl-partitioning-declarative-limitations">

65
doc/src/sgml/ref/alter_table.sgml
View File

@ -37,6 +37,10 @@ ALTER TABLE [ IF EXISTS ] <replaceable class="parameter">name</replaceable>
ATTACH PARTITION <replaceable class="parameter">partition_name</replaceable> { FOR VALUES <replaceable class="parameter">partition_bound_spec</replaceable> | DEFAULT }
ALTER TABLE [ IF EXISTS ] <replaceable class="parameter">name</replaceable>
DETACH PARTITION <replaceable class="parameter">partition_name</replaceable> [ CONCURRENTLY | FINALIZE ]
ALTER TABLE [ IF EXISTS ] <replaceable class="parameter">name</replaceable>
SPLIT PARTITION <replaceable class="parameter">partition_name</replaceable> INTO
(PARTITION <replaceable class="parameter">partition_name1</replaceable> { FOR VALUES <replaceable class="parameter">partition_bound_spec</replaceable> | DEFAULT },
PARTITION <replaceable class="parameter">partition_name2</replaceable> { FOR VALUES <replaceable class="parameter">partition_bound_spec</replaceable> | DEFAULT } [, ...])
ALTER TABLE [ IF EXISTS ] <replaceable class="parameter">name</replaceable>
MERGE PARTITIONS (<replaceable class="parameter">partition_name1</replaceable>, <replaceable class="parameter">partition_name2</replaceable> [, ...])
INTO <replaceable class="parameter">partition_name</replaceable>
@ -1121,6 +1125,44 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
</listitem>
</varlistentry>
<varlistentry id="sql-altertable-split-partition">
<term><literal>SPLIT PARTITION <replaceable class="parameter">partition_name</replaceable> INTO (PARTITION <replaceable class="parameter">partition_name1</replaceable> { FOR VALUES <replaceable class="parameter">partition_bound_spec</replaceable> | DEFAULT }, PARTITION <replaceable class="parameter">partition_name2</replaceable> { FOR VALUES <replaceable class="parameter">partition_bound_spec</replaceable> | DEFAULT } [, ...])</literal></term>
<listitem>
<para>
This form splits a single partition of the target table. Hash-partitioning
is not supported. Bounds of new partitions should not overlap with new and
existing partitions (except <replaceable class="parameter">partition_name</replaceable>).
If the split partition is a DEFAULT partition, one of the new partitions must be DEFAULT.
In case one of the new partitions or one of existing partitions is DEFAULT,
new partitions <replaceable class="parameter">partition_name1</replaceable>,
<replaceable class="parameter">partition_name2</replaceable>, ... can have spaces
between partitions bounds. If the partitioned table does not have a DEFAULT
partition, the DEFAULT partition can be defined as one of the new partitions.
</para>
<para>
In case new partitions do not contain a DEFAULT partition and the partitioned table
does not have a DEFAULT partition, the following must be true: sum bounds of
new partitions <replaceable class="parameter">partition_name1</replaceable>,
<replaceable class="parameter">partition_name2</replaceable>, ... should be
equal to bound of split partition <replaceable class="parameter">partition_name</replaceable>.
One of the new partitions <replaceable class="parameter">partition_name1</replaceable>,
<replaceable class="parameter">partition_name2</replaceable>, ... can have
the same name as split partition <replaceable class="parameter">partition_name</replaceable>
(this is suitable in case of splitting a DEFAULT partition: we split it, but after
splitting we have a partition with the same name).
Only simple, non-partitioned partition can be split.
</para>
<note>
<para>
This command acquires an <literal>ACCESS EXCLUSIVE</literal> lock.
This is a significant limitation, which limits the usage of this
command with large partitioned tables under a high load.
</para>
</note>
</listitem>
</varlistentry>
<varlistentry id="sql-altertable-merge-partitions">
<term><literal>MERGE PARTITIONS (<replaceable class="parameter">partition_name1</replaceable>, <replaceable class="parameter">partition_name2</replaceable> [, ...]) INTO <replaceable class="parameter">partition_name</replaceable></literal></term>
@ -1188,7 +1230,8 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
All the forms of ALTER TABLE that act on a single table, except
<literal>RENAME</literal>, <literal>SET SCHEMA</literal>,
<literal>ATTACH PARTITION</literal>, <literal>DETACH PARTITION</literal>,
and <literal>MERGE PARTITIONS</literal> can be combined into
<literal>SPLIT PARTITION</literal>, and <literal>MERGE PARTITIONS</literal>
can be combined into
a list of multiple alterations to be applied together. For example, it
is possible to add several columns and/or alter the type of several
columns in a single command. This is particularly useful with large
@ -1432,7 +1475,7 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
<listitem>
<para>
The name of the table to attach as a new partition or to detach from this table,
or the name of the new merged partition.
or the name of split partition, or the name of the new merged partition.
</para>
</listitem>
</varlistentry>
@ -1848,6 +1891,24 @@ ALTER TABLE measurement
DETACH PARTITION measurement_y2015m12;
</programlisting></para>
<para>
To split a single partition of the range-partitioned table:
<programlisting>
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2023 INTO
(PARTITION sales_feb2023 FOR VALUES FROM ('2023-02-01') TO ('2023-03-01'),
PARTITION sales_mar2023 FOR VALUES FROM ('2023-03-01') TO ('2023-04-01'),
PARTITION sales_apr2023 FOR VALUES FROM ('2023-04-01') TO ('2023-05-01'));
</programlisting></para>
<para>
To split a single partition of the list-partitioned table:
<programlisting>
ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
(PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
PARTITION sales_east FOR VALUES IN ('Bejing', 'Delhi', 'Vladivostok'),
PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Kyiv'));
</programlisting></para>
<para>
To merge several partitions into one partition of the target table:
<programlisting>

411
src/backend/commands/tablecmds.c
View File

@ -670,6 +670,9 @@ static void ATDetachCheckNoForeignKeyRefs(Relation partition);
static char GetAttributeCompression(Oid atttypid, const char *compression);
static char GetAttributeStorage(Oid atttypid, const char *storagemode);
static void ATExecSplitPartition(List **wqueue, AlteredTableInfo *tab,
Relation rel, PartitionCmd *cmd,
AlterTableUtilityContext *context);
static void ATExecMergePartitions(List **wqueue, AlteredTableInfo *tab, Relation rel,
PartitionCmd *cmd, AlterTableUtilityContext *context);
@ -4740,6 +4743,10 @@ AlterTableGetLockLevel(List *cmds)
cmd_lockmode = ShareUpdateExclusiveLock;
break;
case AT_SplitPartition:
cmd_lockmode = AccessExclusiveLock;
break;
case AT_MergePartitions:
cmd_lockmode = AccessExclusiveLock;
break;
@ -5163,6 +5170,11 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
/* No command-specific prep needed */
pass = AT_PASS_MISC;
break;
case AT_SplitPartition:
ATSimplePermissions(cmd->subtype, rel, ATT_TABLE);
/* No command-specific prep needed */
pass = AT_PASS_MISC;
break;
case AT_MergePartitions:
ATSimplePermissions(cmd->subtype, rel, ATT_TABLE);
/* No command-specific prep needed */
@ -5565,6 +5577,14 @@ ATExecCmd(List **wqueue, AlteredTableInfo *tab,
case AT_DetachPartitionFinalize:
address = ATExecDetachPartitionFinalize(rel, ((PartitionCmd *) cmd->def)->name);
break;
case AT_SplitPartition:
cmd = ATParseTransformCmd(wqueue, tab, rel, cmd, false, lockmode,
cur_pass, context);
Assert(cmd != NULL);
Assert(rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE);
ATExecSplitPartition(wqueue, tab, rel, (PartitionCmd *) cmd->def,
context);
break;
case AT_MergePartitions:
cmd = ATParseTransformCmd(wqueue, tab, rel, cmd, false, lockmode,
cur_pass, context);
@ -6567,6 +6587,8 @@ alter_table_type_to_string(AlterTableType cmdtype)
return "DETACH PARTITION";
case AT_DetachPartitionFinalize:
return "DETACH PARTITION ... FINALIZE";
case AT_SplitPartition:
return "SPLIT PARTITION";
case AT_MergePartitions:
return "MERGE PARTITIONS";
case AT_AddIdentity:
@ -20852,6 +20874,260 @@ GetAttributeStorage(Oid atttypid, const char *storagemode)
return cstorage;
}
/*
* Struct with context of new partition for insert rows from splited partition
*/
typedef struct SplitPartitionContext
{
ExprState *partqualstate; /* expression for check slot for partition
* (NULL for DEFAULT partition) */
BulkInsertState bistate; /* state of bulk inserts for partition */
TupleTableSlot *dstslot; /* slot for insert row into partition */
Relation partRel; /* relation for partition */
} SplitPartitionContext;
/*
* createSplitPartitionContext: create context for partition and fill it
*/
static SplitPartitionContext *
createSplitPartitionContext(Relation partRel)
{
SplitPartitionContext *pc;
pc = (SplitPartitionContext *) palloc0(sizeof(SplitPartitionContext));
pc->partRel = partRel;
/*
* Prepare a BulkInsertState for table_tuple_insert. The FSM is empty, so
* don't bother using it.
*/
pc->bistate = GetBulkInsertState();
/* Create tuple slot for new partition. */
pc->dstslot = MakeSingleTupleTableSlot(RelationGetDescr(pc->partRel),
table_slot_callbacks(pc->partRel));
ExecStoreAllNullTuple(pc->dstslot);
return pc;
}
/*
* deleteSplitPartitionContext: delete context for partition
*/
static void
deleteSplitPartitionContext(SplitPartitionContext *pc, int ti_options)
{
ExecDropSingleTupleTableSlot(pc->dstslot);
FreeBulkInsertState(pc->bistate);
table_finish_bulk_insert(pc->partRel, ti_options);
pfree(pc);
}
/*
* moveSplitTableRows: scan split partition (splitRel) of partitioned table
* (rel) and move rows into new partitions.
*
* New partitions description:
* partlist: list of pointers to SinglePartitionSpec structures.
* newPartRels: list of Relation's.
* defaultPartOid: oid of DEFAULT partition, for table rel.
*/
static void
moveSplitTableRows(Relation rel, Relation splitRel, List *partlist, List *newPartRels, Oid defaultPartOid)
{
/* The FSM is empty, so don't bother using it. */
int ti_options = TABLE_INSERT_SKIP_FSM;
CommandId mycid;
EState *estate;
ListCell *listptr,
*listptr2;
TupleTableSlot *srcslot;
ExprContext *econtext;
TableScanDesc scan;
Snapshot snapshot;
MemoryContext oldCxt;
List *partContexts = NIL;
TupleConversionMap *tuple_map;
SplitPartitionContext *defaultPartCtx = NULL,
*pc;
bool isOldDefaultPart = false;
mycid = GetCurrentCommandId(true);
estate = CreateExecutorState();
forboth(listptr, partlist, listptr2, newPartRels)
{
SinglePartitionSpec *sps = (SinglePartitionSpec *) lfirst(listptr);
pc = createSplitPartitionContext((Relation) lfirst(listptr2));
if (sps->bound->is_default)
{
/* We should not create constraint for detached DEFAULT partition. */
defaultPartCtx = pc;
}
else
{
List *partConstraint;
/* Build expression execution states for partition check quals. */
partConstraint = get_qual_from_partbound(rel, sps->bound);
partConstraint =
(List *) eval_const_expressions(NULL,
(Node *) partConstraint);
/* Make boolean expression for ExecCheck(). */
partConstraint = list_make1(make_ands_explicit(partConstraint));
/*
* Map the vars in the constraint expression from rel's attnos to
* splitRel's.
*/
partConstraint = map_partition_varattnos(partConstraint,
1, splitRel, rel);
pc->partqualstate =
ExecPrepareExpr((Expr *) linitial(partConstraint), estate);
Assert(pc->partqualstate != NULL);
}
/* Store partition context into list. */
partContexts = lappend(partContexts, pc);
}
/*
* Create partition context for DEFAULT partition. We can insert values
* into this partition in case spaces with values between new partitions.
*/
if (!defaultPartCtx && OidIsValid(defaultPartOid))
{
/* Indicate that we allocate context for old DEFAULT partition */
isOldDefaultPart = true;
defaultPartCtx = createSplitPartitionContext(table_open(defaultPartOid, AccessExclusiveLock));
}
econtext = GetPerTupleExprContext(estate);
/* Create necessary tuple slot. */
srcslot = MakeSingleTupleTableSlot(RelationGetDescr(splitRel),
table_slot_callbacks(splitRel));
/*
* Map computing for moving attributes of split partition to new partition
* (for first new partition but other new partitions can use the same
* map).
*/
pc = (SplitPartitionContext *) lfirst(list_head(partContexts));
tuple_map = convert_tuples_by_name(RelationGetDescr(splitRel),
RelationGetDescr(pc->partRel));
/* Scan through the rows. */
snapshot = RegisterSnapshot(GetLatestSnapshot());
scan = table_beginscan(splitRel, snapshot, 0, NULL);
/*
* Switch to per-tuple memory context and reset it for each tuple
* produced, so we don't leak memory.
*/
oldCxt = MemoryContextSwitchTo(GetPerTupleMemoryContext(estate));
while (table_scan_getnextslot(scan, ForwardScanDirection, srcslot))
{
bool found = false;
bool insert_indexes;
TupleTableSlot *insertslot;
/* Extract data from old tuple. */
slot_getallattrs(srcslot);
econtext->ecxt_scantuple = srcslot;
/* Search partition for current slot srcslot. */
foreach(listptr, partContexts)
{
pc = (SplitPartitionContext *) lfirst(listptr);
if (pc->partqualstate /* skip DEFAULT partition */ &&
ExecCheck(pc->partqualstate, econtext))
{
found = true;
break;
}
ResetExprContext(econtext);
}
if (!found)
{
/* Use DEFAULT partition if it exists. */
if (defaultPartCtx)
pc = defaultPartCtx;
else
ereport(ERROR,
(errcode(ERRCODE_CHECK_VIOLATION),
errmsg("can not find partition for split partition row"),
errtable(splitRel)));
}
if (tuple_map)
{
/* Need to use map for copy attributes. */
insertslot = execute_attr_map_slot(tuple_map->attrMap, srcslot, pc->dstslot);
}
else
{
/* Copy attributes directly. */
insertslot = pc->dstslot;
ExecClearTuple(insertslot);
memcpy(insertslot->tts_values, srcslot->tts_values,
sizeof(Datum) * srcslot->tts_nvalid);
memcpy(insertslot->tts_isnull, srcslot->tts_isnull,
sizeof(bool) * srcslot->tts_nvalid);
ExecStoreVirtualTuple(insertslot);
}
/*
* Write the tuple out to the new relation. We ignore the
* 'insert_indexes' flag since newPartRel has no indexes anyway.
*/
(void) table_tuple_insert(pc->partRel, insertslot, mycid,
ti_options, pc->bistate, &insert_indexes);
ResetExprContext(econtext);
CHECK_FOR_INTERRUPTS();
}
MemoryContextSwitchTo(oldCxt);
table_endscan(scan);
UnregisterSnapshot(snapshot);
if (tuple_map)
free_conversion_map(tuple_map);
ExecDropSingleTupleTableSlot(srcslot);
FreeExecutorState(estate);
foreach(listptr, partContexts)
deleteSplitPartitionContext((SplitPartitionContext *) lfirst(listptr), ti_options);
/* Need to close table and free buffers for DEFAULT partition. */
if (isOldDefaultPart)
{
Relation defaultPartRel = defaultPartCtx->partRel;
deleteSplitPartitionContext(defaultPartCtx, ti_options);
/* Keep the lock until commit. */
table_close(defaultPartRel, NoLock);
}
}
/*
* createPartitionTable: create table for new partition with given name
* (newPartName) like table (modelRelName)
@ -20906,6 +21182,141 @@ createPartitionTable(RangeVar *newPartName, RangeVar *modelRelName,
NULL);
}
/*
* ALTER TABLE <name> SPLIT PARTITION <partition-name> INTO <partition-list>
*/
static void
ATExecSplitPartition(List **wqueue, AlteredTableInfo *tab, Relation rel,
PartitionCmd *cmd, AlterTableUtilityContext *context)
{
Relation splitRel;
Oid splitRelOid;
char relname[NAMEDATALEN];
Oid namespaceId;
ListCell *listptr,
*listptr2;
bool isSameName = false;
char tmpRelName[NAMEDATALEN];
List *newPartRels = NIL;
ObjectAddress object;
RangeVar *parentName;
Oid defaultPartOid;
defaultPartOid = get_default_oid_from_partdesc(RelationGetPartitionDesc(rel, true));
/*
* We are going to detach and remove this partition: need to use exclusive
* lock for prevent DML-queries to the partition.
*/
splitRel = table_openrv(cmd->name, AccessExclusiveLock);
if (splitRel->rd_rel->relkind != RELKIND_RELATION)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("cannot split non-table partition \"%s\"",
RelationGetRelationName(splitRel))));
splitRelOid = RelationGetRelid(splitRel);
/* Check descriptions of new partitions. */
foreach(listptr, cmd->partlist)
{
Oid existing_relid;
SinglePartitionSpec *sps = (SinglePartitionSpec *) lfirst(listptr);
strlcpy(relname, sps->name->relname, NAMEDATALEN);
/*
* Look up the namespace in which we are supposed to create the
* partition, check we have permission to create there, lock it
* against concurrent drop, and mark stmt->relation as
* RELPERSISTENCE_TEMP if a temporary namespace is selected.
*/
namespaceId =
RangeVarGetAndCheckCreationNamespace(sps->name, NoLock, NULL);
/*
* This would fail later on anyway, if the relation already exists.
* But by catching it here we can emit a nicer error message.
*/
existing_relid = get_relname_relid(relname, namespaceId);
if (existing_relid == splitRelOid && !isSameName)
/* One new partition can have the same name as split partition. */
isSameName = true;
else if (existing_relid != InvalidOid)
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_TABLE),
errmsg("relation \"%s\" already exists", relname)));
}
/* Detach split partition. */
RemoveInheritance(splitRel, rel, false);
/* Do the final part of detaching. */
DetachPartitionFinalize(rel, splitRel, false, defaultPartOid);
/*
* If new partition has the same name as split partition then we should
* rename split partition for reuse name.
*/
if (isSameName)
{
/*
* We must bump the command counter to make the split partition tuple
* visible for rename.
*/
CommandCounterIncrement();
/* Rename partition. */
sprintf(tmpRelName, "split-%u-%X-tmp", RelationGetRelid(rel), MyProcPid);
RenameRelationInternal(splitRelOid, tmpRelName, false, false);
/*
* We must bump the command counter to make the split partition tuple
* visible after rename.
*/
CommandCounterIncrement();
}
/* Create new partitions (like split partition), without indexes. */
parentName = makeRangeVar(get_namespace_name(RelationGetNamespace(rel)),
RelationGetRelationName(rel), -1);
foreach(listptr, cmd->partlist)
{
SinglePartitionSpec *sps = (SinglePartitionSpec *) lfirst(listptr);
Relation newPartRel;
createPartitionTable(sps->name, parentName, context);
/* Open the new partition and acquire exclusive lock on it. */
newPartRel = table_openrv(sps->name, AccessExclusiveLock);
newPartRels = lappend(newPartRels, newPartRel);
}
/* Copy data from split partition to new partitions. */
moveSplitTableRows(rel, splitRel, cmd->partlist, newPartRels, defaultPartOid);
/* Keep the lock until commit. */
table_close(splitRel, NoLock);
/* Attach new partitions to partitioned table. */
forboth(listptr, cmd->partlist, listptr2, newPartRels)
{
SinglePartitionSpec *sps = (SinglePartitionSpec *) lfirst(listptr);
Relation newPartRel = (Relation) lfirst(listptr2);
/* wqueue = NULL: verification for each cloned constraint is not need. */
attachPartitionTable(NULL, rel, newPartRel, sps->bound);
/* Keep the lock until commit. */
table_close(newPartRel, NoLock);
}
/* Drop split partition. */
object.classId = RelationRelationId;
object.objectId = splitRelOid;
object.objectSubId = 0;
/* Probably DROP_CASCADE is not needed. */
performDeletion(&object, DROP_RESTRICT, 0);
}
/*
* moveMergedTablesRows: scan partitions to be merged (mergingPartitionsList)
* of the partitioned table (rel) and move rows into the new partition

38
src/backend/parser/gram.y
View File

@ -269,6 +269,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query);
PartitionElem *partelem;
PartitionSpec *partspec;
PartitionBoundSpec *partboundspec;
SinglePartitionSpec *singlepartspec;
RoleSpec *rolespec;
PublicationObjSpec *publicationobjectspec;
struct SelectLimit *selectlimit;
@ -646,6 +647,8 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query);
%type <partelem> part_elem
%type <list> part_params
%type <partboundspec> PartitionBoundSpec
%type <singlepartspec> SinglePartitionSpec
%type <list> partitions_list
%type <list> hash_partbound
%type <defelt> hash_partbound_elem
@ -777,7 +780,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query);
SAVEPOINT SCALAR SCHEMA SCHEMAS SCROLL SEARCH SECOND_P SECURITY SELECT
SEQUENCE SEQUENCES
SERIALIZABLE SERVER SESSION SESSION_USER SET SETS SETOF SHARE SHOW
SIMILAR SIMPLE SKIP SMALLINT SNAPSHOT SOME SOURCE SQL_P STABLE STANDALONE_P
SIMILAR SIMPLE SKIP SMALLINT SNAPSHOT SOME SPLIT SOURCE SQL_P STABLE STANDALONE_P
START STATEMENT STATISTICS STDIN STDOUT STORAGE STORED STRICT_P STRING_P STRIP_P
SUBSCRIPTION SUBSTRING SUPPORT SYMMETRIC SYSID SYSTEM_P SYSTEM_USER
@ -2307,6 +2310,23 @@ alter_table_cmds:
| alter_table_cmds ',' alter_table_cmd { $$ = lappend($1, $3); }
;
partitions_list:
SinglePartitionSpec { $$ = list_make1($1); }
| partitions_list ',' SinglePartitionSpec { $$ = lappend($1, $3); }
;
SinglePartitionSpec:
PARTITION qualified_name PartitionBoundSpec
{
SinglePartitionSpec *n = makeNode(SinglePartitionSpec);
n->name = $2;
n->bound = $3;
$$ = n;
}
;
partition_cmd:
/* ALTER TABLE <name> ATTACH PARTITION <table_name> FOR VALUES */
ATTACH PARTITION qualified_name PartitionBoundSpec
@ -2351,6 +2371,20 @@ partition_cmd:
n->def = (Node *) cmd;
$$ = (Node *) n;
}
/* ALTER TABLE <name> SPLIT PARTITION <partition_name> INTO () */
| SPLIT PARTITION qualified_name INTO '(' partitions_list ')'
{
AlterTableCmd *n = makeNode(AlterTableCmd);
PartitionCmd *cmd = makeNode(PartitionCmd);
n->subtype = AT_SplitPartition;
cmd->name = $3;
cmd->bound = NULL;
cmd->partlist = $6;
cmd->concurrent = false;
n->def = (Node *) cmd;
$$ = (Node *) n;
}
/* ALTER TABLE <name> MERGE PARTITIONS () INTO <partition_name> */
| MERGE PARTITIONS '(' qualified_name_list ')' INTO qualified_name
{
@ -17756,6 +17790,7 @@ unreserved_keyword:
| SKIP
| SNAPSHOT
| SOURCE
| SPLIT
| SQL_P
| STABLE
| STANDALONE_P
@ -18393,6 +18428,7 @@ bare_label_keyword:
| SNAPSHOT
| SOME
| SOURCE
| SPLIT
| SQL_P
| STABLE
| STANDALONE_P

62
src/backend/parser/parse_utilcmd.c
View File

@ -136,7 +136,7 @@ static void transformConstraintAttrs(CreateStmtContext *cxt,
List *constraintList);
static void transformColumnType(CreateStmtContext *cxt, ColumnDef *column);
static void setSchemaName(const char *context_schema, char **stmt_schema_name);
static void transformPartitionCmd(CreateStmtContext *cxt, PartitionCmd *cmd);
static void transformPartitionCmd(CreateStmtContext *cxt, PartitionBoundSpec *bound);
static List *transformPartitionRangeBounds(ParseState *pstate, List *blist,
Relation parent);
static void validateInfiniteBounds(ParseState *pstate, List *blist);
@ -3415,6 +3415,43 @@ transformRuleStmt(RuleStmt *stmt, const char *queryString,
}
/*
* transformPartitionCmdForSplit
* Analyze the ALTER TABLLE ... SPLIT PARTITION command
*
* For each new partition sps->bound is set to the transformed value of bound.
* Does checks for bounds of new partitions.
*/
static void
transformPartitionCmdForSplit(CreateStmtContext *cxt, PartitionCmd *partcmd)
{
Relation parent = cxt->rel;
Oid splitPartOid;
ListCell *listptr;
if (parent->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("\"%s\" is not a partitioned table", RelationGetRelationName(parent))));
/* Transform partition bounds for all partitions in the list: */
foreach(listptr, partcmd->partlist)
{
SinglePartitionSpec *sps = (SinglePartitionSpec *) lfirst(listptr);
cxt->partbound = NULL;
transformPartitionCmd(cxt, sps->bound);
/* Assign transformed value of the partition bound. */
sps->bound = cxt->partbound;
}
splitPartOid = RangeVarGetRelid(partcmd->name, NoLock, false);
/* Then we should check partitions with transformed bounds. */
check_partitions_for_split(parent, splitPartOid, partcmd->name, partcmd->partlist, cxt->pstate);
}
/*
* transformPartitionCmdForMerge
* Analyze the ALTER TABLLE ... MERGE PARTITIONS command
@ -3751,7 +3788,7 @@ transformAlterTableStmt(Oid relid, AlterTableStmt *stmt,
{
PartitionCmd *partcmd = (PartitionCmd *) cmd->def;
transformPartitionCmd(&cxt, partcmd);
transformPartitionCmd(&cxt, partcmd->bound);
/* assign transformed value of the partition bound */
partcmd->bound = cxt.partbound;
}
@ -3759,6 +3796,7 @@ transformAlterTableStmt(Oid relid, AlterTableStmt *stmt,
newcmds = lappend(newcmds, cmd);
break;
case AT_SplitPartition:
case AT_MergePartitions:
{
PartitionCmd *partcmd = (PartitionCmd *) cmd->def;
@ -3767,7 +3805,11 @@ transformAlterTableStmt(Oid relid, AlterTableStmt *stmt,
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("list of new partitions should contains at least two items")));
transformPartitionCmdForMerge(&cxt, partcmd);
if (cmd->subtype == AT_SplitPartition)
transformPartitionCmdForSplit(&cxt, partcmd);
else
transformPartitionCmdForMerge(&cxt, partcmd);
newcmds = lappend(newcmds, cmd);
break;
}
@ -4172,13 +4214,13 @@ setSchemaName(const char *context_schema, char **stmt_schema_name)
/*
* transformPartitionCmd
* Analyze the ATTACH/DETACH PARTITION command
* Analyze the ATTACH/DETACH/SPLIT PARTITION command
*
* In case of the ATTACH PARTITION command, cxt->partbound is set to the
* transformed value of cmd->bound.
* In case of the ATTACH/SPLIT PARTITION command, cxt->partbound is set to the
* transformed value of bound.
*/
static void
transformPartitionCmd(CreateStmtContext *cxt, PartitionCmd *cmd)
transformPartitionCmd(CreateStmtContext *cxt, PartitionBoundSpec *bound)
{
Relation parentRel = cxt->rel;
@ -4187,9 +4229,9 @@ transformPartitionCmd(CreateStmtContext *cxt, PartitionCmd *cmd)
case RELKIND_PARTITIONED_TABLE:
/* transform the partition bound, if any */
Assert(RelationGetPartitionKey(parentRel) != NULL);
if (cmd->bound != NULL)
if (bound != NULL)
cxt->partbound = transformPartitionBound(cxt->pstate, parentRel,
cmd->bound);
bound);
break;
case RELKIND_PARTITIONED_INDEX:
@ -4197,7 +4239,7 @@ transformPartitionCmd(CreateStmtContext *cxt, PartitionCmd *cmd)
* A partitioned index cannot have a partition bound set. ALTER
* INDEX prevents that with its grammar, but not ALTER TABLE.
*/
if (cmd->bound != NULL)
if (bound != NULL)
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("\"%s\" is not a partitioned table",

657
src/backend/partitioning/partbounds.c
View File

@ -5040,10 +5040,69 @@ check_two_partitions_bounds_range(Relation parent,
}
}
/*
* check_partitions_not_overlap_list
*
* (function for BY LIST partitioning)
*
* This is a helper function for check_partitions_for_split().
* Checks that the values of the new partitions do not overlap.
*
* parent: partitioned table
* parts: array of SinglePartitionSpec structs with info about split partitions
* nparts: size of array "parts"
*/
static void
check_partitions_not_overlap_list(Relation parent,
SinglePartitionSpec **parts,
int nparts,
ParseState *pstate)
{
PartitionKey key PG_USED_FOR_ASSERTS_ONLY = RelationGetPartitionKey(parent);
int overlap_location = -1;
int i,
j;
SinglePartitionSpec *sps1,
*sps2;
List *overlap;
Assert(key->strategy == PARTITION_STRATEGY_LIST);
for (i = 0; i < nparts; i++)
{
sps1 = parts[i];
for (j = i + 1; j < nparts; j++)
{
sps2 = parts[j];
/*
* Calculate intersection between values of two partitions.
*/
overlap = list_intersection(sps1->bound->listdatums,
sps2->bound->listdatums);
if (list_length(overlap) > 0)
{
Const *val = (Const *) lfirst(list_head(overlap));
overlap_location = val->location;
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("new partition \"%s\" would overlap with another new partition \"%s\"",
sps1->name->relname, sps2->name->relname),
parser_errposition(pstate, overlap_location)));
}
}
}
}
/*
* get_partition_bound_spec
*
* Returns description of partition with Oid "partOid" and name "name".
*
* partOid: partition Oid
* name: partition name
*/
static PartitionBoundSpec *
get_partition_bound_spec(Oid partOid, RangeVar *name)
@ -5076,6 +5135,604 @@ get_partition_bound_spec(Oid partOid, RangeVar *name)
return boundspec;
}
/*
* check_partition_bounds_for_split_range
*
* (function for BY RANGE partitioning)
*
* Checks that bounds of new partition "spec" is inside bounds of split
* partition (with Oid splitPartOid). If first=true (this means that "spec" is
* the first of new partitions) then lower bound of "spec" should be equal (or
* greater than or equal in case defaultPart=true) to lower bound of split
* partition. If last=true (this means that "spec" is the last of new
* partitions) then upper bound of of "spec" should be equal (or less than or
* equal in case defaultPart=true) to upper bound of split partition.
*
* parent: partitioned table
* relname: name of the new partition
* spec: bounds specification of the new partition
* splitPartOid: split partition Oid
* splitPartName: split partition name
* first: true in case new partition "spec" is first of new partitions
* last: true in case new partition "spec" is last of new partitions
* defaultPart: true in case partitioned table has DEFAULT partition
* pstate: pointer to ParseState struct for determine error position
*/
static void
check_partition_bounds_for_split_range(Relation parent,
char *relname,
PartitionBoundSpec *spec,
Oid splitPartOid,
RangeVar *splitPartName,
bool first,
bool last,
bool defaultPart,
ParseState *pstate)
{
PartitionKey key = RelationGetPartitionKey(parent);
PartitionRangeBound *lower,
*upper;
int cmpval;
Assert(key->strategy == PARTITION_STRATEGY_RANGE);
Assert(spec->strategy == PARTITION_STRATEGY_RANGE);
lower = make_one_partition_rbound(key, -1, spec->lowerdatums, true);
upper = make_one_partition_rbound(key, -1, spec->upperdatums, false);
/*
* First check if the resulting range would be empty with specified lower
* and upper bounds. partition_rbound_cmp cannot return zero here, since
* the lower-bound flags are different.
*/
cmpval = partition_rbound_cmp(key->partnatts,
key->partsupfunc,
key->partcollation,
lower->datums, lower->kind,
true, upper);
Assert(cmpval != 0);
if (cmpval > 0)
{
/* Point to problematic key in the lower datums list. */
PartitionRangeDatum *datum = list_nth(spec->lowerdatums, cmpval - 1);
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("empty range bound specified for partition \"%s\"",
relname),
errdetail("Specified lower bound %s is greater than or equal to upper bound %s.",
get_range_partbound_string(spec->lowerdatums),
get_range_partbound_string(spec->upperdatums)),
parser_errposition(pstate, datum->location)));
}
/* Need to check first and last partitions (from set of new partitions) */
if (first || last)
{
PartitionBoundSpec *split_spec = get_partition_bound_spec(splitPartOid, splitPartName);
bool overlap = false;
if (first)
{
PartitionRangeBound *split_lower;
split_lower = make_one_partition_rbound(key, -1, split_spec->lowerdatums, true);
cmpval = partition_rbound_cmp(key->partnatts,
key->partsupfunc,
key->partcollation,
lower->datums, lower->kind,
true, split_lower);
/*
* Lower bound of "spec" should be equal (or greater than or equal
* in case defaultPart=true) to lower bound of split partition.
*/
if ((!defaultPart && cmpval) || (defaultPart && cmpval < 0))
overlap = true;
}
else
{
PartitionRangeBound *split_upper;
split_upper = make_one_partition_rbound(key, -1, split_spec->upperdatums, false);
cmpval = partition_rbound_cmp(key->partnatts,
key->partsupfunc,
key->partcollation,
upper->datums, upper->kind,
false, split_upper);
/*
* Upper bound of of "spec" should be equal (or less than or equal
* in case defaultPart=true) to upper bound of split partition.
*/
if ((!defaultPart && cmpval) || (defaultPart && cmpval > 0))
overlap = true;
}
if (overlap)
{
PartitionRangeDatum *datum;
datum = list_nth(first ? spec->lowerdatums : spec->upperdatums, abs(cmpval) - 1);
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("%s bound of partition \"%s\" is %s %s bound of split partition",
first ? "lower" : "upper",
relname,
defaultPart ? (first ? "less than" : "greater than") : "not equals to",
first ? "lower" : "upper"),
parser_errposition(pstate, datum->location)));
}
}
}
/*
* check_partition_bounds_for_split_list
*
* (function for BY LIST partitioning)
*
* Checks that bounds of new partition is inside bounds of split partition
* (with Oid splitPartOid).
*
* parent: partitioned table
* relname: name of the new partition
* spec: bounds specification of the new partition
* splitPartOid: split partition Oid
* pstate: pointer to ParseState struct for determine error position
*/
static void
check_partition_bounds_for_split_list(Relation parent, char *relname,
PartitionBoundSpec *spec,
Oid splitPartOid,
ParseState *pstate)
{
PartitionKey key = RelationGetPartitionKey(parent);
PartitionDesc partdesc = RelationGetPartitionDesc(parent, false);
PartitionBoundInfo boundinfo = partdesc->boundinfo;
int with = -1;
bool overlap = false;
int overlap_location = -1;
ListCell *cell;
Assert(key->strategy == PARTITION_STRATEGY_LIST);
Assert(spec->strategy == PARTITION_STRATEGY_LIST);
Assert(boundinfo && boundinfo->strategy == PARTITION_STRATEGY_LIST);
/*
* Search each value of new partition "spec" in existing partitions. All
* of them should be in split partition (with Oid splitPartOid).
*/
foreach(cell, spec->listdatums)
{
Const *val = lfirst_node(Const, cell);
overlap_location = val->location;
if (!val->constisnull)
{
int offset;
bool equal;
offset = partition_list_bsearch(&key->partsupfunc[0],
key->partcollation,
boundinfo,
val->constvalue,
&equal);
if (offset >= 0 && equal)
{
with = boundinfo->indexes[offset];
if (partdesc->oids[with] != splitPartOid)
{
overlap = true;
break;
}
}
else
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("new partition \"%s\" cannot have this value because split partition does not have",
relname),
parser_errposition(pstate, overlap_location)));
}
else if (partition_bound_accepts_nulls(boundinfo))
{
with = boundinfo->null_index;
if (partdesc->oids[with] != splitPartOid)
{
overlap = true;
break;
}
}
else
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("new partition \"%s\" cannot have NULL value because split partition does not have",
relname),
parser_errposition(pstate, overlap_location)));
}
if (overlap)
{
Assert(with >= 0);
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("new partition \"%s\" would overlap with another (not split) partition \"%s\"",
relname, get_rel_name(partdesc->oids[with])),
parser_errposition(pstate, overlap_location)));
}
}
/*
* find_value_in_new_partitions_list
*
* (function for BY LIST partitioning)
*
* Function returns true in case any of new partitions contains value "value".
*
* partsupfunc: information about comparison function associated with the partition key
* partcollation: partitioning collation
* parts: pointer to array with new partitions descriptions
* nparts: number of new partitions
* value: the value that we are looking for
* isnull: true if the value that we are looking for is NULL
*/
static bool
find_value_in_new_partitions_list(FmgrInfo *partsupfunc,
Oid *partcollation,
SinglePartitionSpec **parts,
int nparts,
Datum value,
bool isnull)
{
ListCell *valptr;
int i;
for (i = 0; i < nparts; i++)
{
SinglePartitionSpec *sps = parts[i];
foreach(valptr, sps->bound->listdatums)
{
Const *val = lfirst_node(Const, valptr);
if (isnull && val->constisnull)
return true;
if (!isnull && !val->constisnull)
{
if (DatumGetInt32(FunctionCall2Coll(&partsupfunc[0],
partcollation[0],
val->constvalue,
value)) == 0)
return true;
}
}
}
return false;
}
/*
* check_parent_values_in_new_partitions
*
* (function for BY LIST partitioning)
*
* Checks that all values of split partition (with Oid partOid) contains in new
* partitions.
*
* parent: partitioned table
* partOid: split partition Oid
* parts: pointer to array with new partitions descriptions
* nparts: number of new partitions
* pstate: pointer to ParseState struct for determine error position
*/
static void
check_parent_values_in_new_partitions(Relation parent,
Oid partOid,
SinglePartitionSpec **parts,
int nparts,
ParseState *pstate)
{
PartitionKey key = RelationGetPartitionKey(parent);
PartitionDesc partdesc = RelationGetPartitionDesc(parent, false);
PartitionBoundInfo boundinfo = partdesc->boundinfo;
int i;
bool found = true;
bool searchNull = false;
Datum datum = PointerGetDatum(NULL);
Assert(key->strategy == PARTITION_STRATEGY_LIST);
/*
* Special processing for NULL value. Search NULL-value if it contains
* split partition (partOid).
*/
if (partition_bound_accepts_nulls(boundinfo) &&
partdesc->oids[boundinfo->null_index] == partOid)
{
if (!find_value_in_new_partitions_list(&key->partsupfunc[0],
key->partcollation, parts, nparts, datum, true))
{
found = false;
searchNull = true;
}
}
/*
* Search all values of split partition with partOid in PartitionDesc of
* partitionde table.
*/
for (i = 0; i < boundinfo->ndatums; i++)
{
if (partdesc->oids[boundinfo->indexes[i]] == partOid)
{
/* We found value that split partition contains. */
datum = boundinfo->datums[i][0];
if (!find_value_in_new_partitions_list(&key->partsupfunc[0],
key->partcollation, parts, nparts, datum, false))
{
found = false;
break;
}
}
}
if (!found)
{
Const *notFoundVal;
if (!searchNull)
/* Make Const for get string representation of not found value. */
notFoundVal = makeConst(key->parttypid[0],
key->parttypmod[0],
key->parttypcoll[0],
key->parttyplen[0],
datum,
false, /* isnull */
key->parttypbyval[0]);
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("new partitions not have value %s but split partition has",
searchNull ? "NULL" : get_list_partvalue_string(notFoundVal))));
}
}
/*
* check_partitions_for_split
*
* Checks new partitions for SPLIT PARTITIONS command:
* 1. DEFAULT partition should be one.
* 2. New partitions should have different names
* (with existing partitions too).
* 3. Bounds of new partitions should not overlap with new and existing
* partitions.
* 4. In case split partition is DEFAULT partition, one of new partitions
* should be DEFAULT.
* 5. In case new partitions or existing partitions contains DEFAULT
* partition, new partitions can have any bounds inside split
* partition bound (can be spaces between partitions bounds).
* 6. In case partitioned table does not have DEFAULT partition, DEFAULT
* partition can be defined as one of new partition.
* 7. In case new partitions not contains DEFAULT partition and
* partitioned table does not have DEFAULT partition the following
* should be true: sum bounds of new partitions should be equal
* to bound of split partition.
*
* parent: partitioned table
* splitPartOid: split partition Oid
* splitPartName: split partition name
* list: list of new partitions
* pstate: pointer to ParseState struct for determine error position
*/
void
check_partitions_for_split(Relation parent,
Oid splitPartOid,
RangeVar *splitPartName,
List *partlist,
ParseState *pstate)
{
PartitionKey key;
char strategy;
Oid defaultPartOid;
bool isSplitPartDefault;
bool existsDefaultPart;
ListCell *listptr;
int default_index = -1;
int i,
j;
SinglePartitionSpec **new_parts;
SinglePartitionSpec *spsPrev = NULL;
int nparts = 0;
key = RelationGetPartitionKey(parent);
strategy = get_partition_strategy(key);
switch (strategy)
{
case PARTITION_STRATEGY_LIST:
case PARTITION_STRATEGY_RANGE:
{
/*
* Make array new_parts with new partitions except DEFAULT
* partition.
*/
new_parts = (SinglePartitionSpec **)
palloc0(list_length(partlist) * sizeof(SinglePartitionSpec *));
i = 0;
foreach(listptr, partlist)
{
SinglePartitionSpec *sps =
(SinglePartitionSpec *) lfirst(listptr);
if (sps->bound->is_default)
{
if (default_index >= 0)
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("DEFAULT partition should be one")),
parser_errposition(pstate, sps->name->location));
default_index = i;
}
else
{
new_parts[nparts++] = sps;
}
i++;
}
}
break;
case PARTITION_STRATEGY_HASH:
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("partition of hash-partitioned table cannot be split")));
break;
default:
elog(ERROR, "unexpected partition strategy: %d",
(int) key->strategy);
break;
}
if (strategy == PARTITION_STRATEGY_RANGE)
{
PartitionRangeBound **lower_bounds;
SinglePartitionSpec **tmp_new_parts;
/*
* For simplify check for ranges of new partitions need to sort all
* partitions in ascending order of them bounds (we compare upper
* bound only).
*/
lower_bounds = (PartitionRangeBound **)
palloc0(nparts * sizeof(PartitionRangeBound *));
/* Create array of lower bounds. */
for (i = 0; i < nparts; i++)
{
lower_bounds[i] = make_one_partition_rbound(key, i,
new_parts[i]->bound->lowerdatums, true);
}
/* Sort array of lower bounds. */
qsort_arg(lower_bounds, nparts, sizeof(PartitionRangeBound *),
qsort_partition_rbound_cmp, (void *) key);
/* Reorder array of partitions. */
tmp_new_parts = new_parts;
new_parts = (SinglePartitionSpec **)
palloc0(nparts * sizeof(SinglePartitionSpec *));
for (i = 0; i < nparts; i++)
new_parts[i] = tmp_new_parts[lower_bounds[i]->index];
pfree(tmp_new_parts);
pfree(lower_bounds);
}
defaultPartOid =
get_default_oid_from_partdesc(RelationGetPartitionDesc(parent, true));
/* isSplitPartDefault flag: is split partition a DEFAULT partition? */
isSplitPartDefault = (defaultPartOid == splitPartOid);
if (isSplitPartDefault && default_index < 0)
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("any partition in the list should be DEFAULT because split partition is DEFAULT")),
parser_errposition(pstate, ((SinglePartitionSpec *) linitial(partlist))->name->location));
}
else if (!isSplitPartDefault && (default_index >= 0) && OidIsValid(defaultPartOid))
{
SinglePartitionSpec *spsDef =
(SinglePartitionSpec *) list_nth(partlist, default_index);
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("new partition cannot be DEFAULT because DEFAULT partition already exists")),
parser_errposition(pstate, spsDef->name->location));
}
/* Indicator that partitioned table has (or will have) DEFAULT partition */
existsDefaultPart = OidIsValid(defaultPartOid) || (default_index >= 0);
for (i = 0; i < nparts; i++)
{
SinglePartitionSpec *sps = new_parts[i];
if (isSplitPartDefault)
{
/*
* In case split partition is DEFAULT partition we can use any
* free ranges - as when creating a new partition.
*/
check_new_partition_bound(sps->name->relname, parent, sps->bound,
pstate);
}
else
{
/*
* Checks that bound of current partition is inside bound of split
* partition. For range partitioning: checks that upper bound of
* previous partition is equal to lower bound of current
* partition. For list partitioning: checks that split partition
* contains all values of current partition.
*/
if (strategy == PARTITION_STRATEGY_RANGE)
{
bool first = (i == 0);
bool last = (i == (nparts - 1));
check_partition_bounds_for_split_range(parent, sps->name->relname, sps->bound,
splitPartOid, splitPartName,
first, last,
existsDefaultPart, pstate);
}
else
check_partition_bounds_for_split_list(parent, sps->name->relname,
sps->bound, splitPartOid, pstate);
}
/* Ranges of new partitions should not overlap. */
if (strategy == PARTITION_STRATEGY_RANGE && spsPrev)
check_two_partitions_bounds_range(parent, spsPrev->name, spsPrev->bound,
sps->name, sps->bound, existsDefaultPart, pstate);
spsPrev = sps;
/* Check: new partitions should have different names. */
for (j = i + 1; j < nparts; j++)
{
SinglePartitionSpec *sps2 = new_parts[j];
if (equal(sps->name, sps2->name))
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_TABLE),
errmsg("name \"%s\" already used", sps2->name->relname)),
parser_errposition(pstate, sps2->name->location));
}
}
if (strategy == PARTITION_STRATEGY_LIST)
{
/* Values of new partitions should not overlap. */
check_partitions_not_overlap_list(parent, new_parts, nparts,
pstate);
/*
* Need to check that all values of split partition contains in new
* partitions. Skip this check if DEFAULT partition exists.
*/
if (!existsDefaultPart)
check_parent_values_in_new_partitions(parent, splitPartOid,
new_parts, nparts, pstate);
}
pfree(new_parts);
}
/*
* calculate_partition_bound_for_merge
*

18
src/backend/utils/adt/ruleutils.c
View File

@ -13241,3 +13241,21 @@ get_range_partbound_string(List *bound_datums)
return buf->data;
}
/*
* get_list_partvalue_string
* A C string representation of one list partition value
*/
char *
get_list_partvalue_string(Const *val)
{
deparse_context context;
StringInfo buf = makeStringInfo();
memset(&context, 0, sizeof(deparse_context));
context.buf = buf;
get_const_expr(val, &context, -1);
return buf->data;
}

1
src/include/nodes/parsenodes.h
View File

@ -2411,6 +2411,7 @@ typedef enum AlterTableType
AT_AttachPartition, /* ATTACH PARTITION */
AT_DetachPartition, /* DETACH PARTITION */
AT_DetachPartitionFinalize, /* DETACH PARTITION FINALIZE */
AT_SplitPartition, /* SPLIT PARTITION */
AT_MergePartitions, /* MERGE PARTITIONS */
AT_AddIdentity, /* ADD IDENTITY */
AT_SetIdentity, /* SET identity column options */

1
src/include/parser/kwlist.h
View File

@ -419,6 +419,7 @@ PG_KEYWORD("smallint", SMALLINT, COL_NAME_KEYWORD, BARE_LABEL)
PG_KEYWORD("snapshot", SNAPSHOT, UNRESERVED_KEYWORD, BARE_LABEL)
PG_KEYWORD("some", SOME, RESERVED_KEYWORD, BARE_LABEL)
PG_KEYWORD("source", SOURCE, UNRESERVED_KEYWORD, BARE_LABEL)
PG_KEYWORD("split", SPLIT, UNRESERVED_KEYWORD, BARE_LABEL)
PG_KEYWORD("sql", SQL_P, UNRESERVED_KEYWORD, BARE_LABEL)
PG_KEYWORD("stable", STABLE, UNRESERVED_KEYWORD, BARE_LABEL)
PG_KEYWORD("standalone", STANDALONE_P, UNRESERVED_KEYWORD, BARE_LABEL)

5
src/include/partitioning/partbounds.h
View File

@ -143,6 +143,11 @@ extern int partition_range_datum_bsearch(FmgrInfo *partsupfunc,
extern int partition_hash_bsearch(PartitionBoundInfo boundinfo,
int modulus, int remainder);
extern void check_partitions_for_split(Relation parent,
Oid splitPartOid,
RangeVar *splitPartName,
List *partlist,
ParseState *pstate);
extern void calculate_partition_bound_for_merge(Relation parent,
List *partNames,
List *partOids,

2
src/include/utils/ruleutils.h
View File

@ -49,4 +49,6 @@ extern char *get_range_partbound_string(List *bound_datums);
extern char *pg_get_statisticsobjdef_string(Oid statextid);
extern char *get_list_partvalue_string(Const *val);
#endif /* RULEUTILS_H */

190
src/test/isolation/expected/partition-split.out Normal file
View File

@ -0,0 +1,190 @@
Parsed test spec with 2 sessions
starting permutation: s1b s1splt s2b s2i s1c s2c s2s
step s1b: BEGIN;
step s1splt: ALTER TABLE tpart SPLIT PARTITION tpart_10_20 INTO
(PARTITION tpart_10_15 FOR VALUES FROM (10) TO (15),
PARTITION tpart_15_20 FOR VALUES FROM (15) TO (20));
step s2b: BEGIN;
step s2i: INSERT INTO tpart VALUES (1, 'text01'); <waiting ...>
step s1c: COMMIT;
step s2i: <... completed>
step s2c: COMMIT;
step s2s: SELECT * FROM tpart;
i|t
--+------
5|text05
1|text01
15|text15
25|text25
35|text35
(5 rows)
starting permutation: s1b s1splt s2brr s2i s1c s2c s2s
step s1b: BEGIN;
step s1splt: ALTER TABLE tpart SPLIT PARTITION tpart_10_20 INTO
(PARTITION tpart_10_15 FOR VALUES FROM (10) TO (15),
PARTITION tpart_15_20 FOR VALUES FROM (15) TO (20));
step s2brr: BEGIN ISOLATION LEVEL REPEATABLE READ;
step s2i: INSERT INTO tpart VALUES (1, 'text01'); <waiting ...>
step s1c: COMMIT;
step s2i: <... completed>
step s2c: COMMIT;
step s2s: SELECT * FROM tpart;
i|t
--+------
5|text05
1|text01
15|text15
25|text25
35|text35
(5 rows)
starting permutation: s1b s1splt s2bs s2i s1c s2c s2s
step s1b: BEGIN;
step s1splt: ALTER TABLE tpart SPLIT PARTITION tpart_10_20 INTO
(PARTITION tpart_10_15 FOR VALUES FROM (10) TO (15),
PARTITION tpart_15_20 FOR VALUES FROM (15) TO (20));
step s2bs: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s2i: INSERT INTO tpart VALUES (1, 'text01'); <waiting ...>
step s1c: COMMIT;
step s2i: <... completed>
step s2c: COMMIT;
step s2s: SELECT * FROM tpart;
i|t
--+------
5|text05
1|text01
15|text15
25|text25
35|text35
(5 rows)
starting permutation: s1brr s1splt s2b s2i s1c s2c s2s
step s1brr: BEGIN ISOLATION LEVEL REPEATABLE READ;
step s1splt: ALTER TABLE tpart SPLIT PARTITION tpart_10_20 INTO
(PARTITION tpart_10_15 FOR VALUES FROM (10) TO (15),
PARTITION tpart_15_20 FOR VALUES FROM (15) TO (20));
step s2b: BEGIN;
step s2i: INSERT INTO tpart VALUES (1, 'text01'); <waiting ...>
step s1c: COMMIT;
step s2i: <... completed>
step s2c: COMMIT;
step s2s: SELECT * FROM tpart;
i|t
--+------
5|text05
1|text01
15|text15
25|text25
35|text35
(5 rows)
starting permutation: s1brr s1splt s2brr s2i s1c s2c s2s
step s1brr: BEGIN ISOLATION LEVEL REPEATABLE READ;
step s1splt: ALTER TABLE tpart SPLIT PARTITION tpart_10_20 INTO
(PARTITION tpart_10_15 FOR VALUES FROM (10) TO (15),
PARTITION tpart_15_20 FOR VALUES FROM (15) TO (20));
step s2brr: BEGIN ISOLATION LEVEL REPEATABLE READ;
step s2i: INSERT INTO tpart VALUES (1, 'text01'); <waiting ...>
step s1c: COMMIT;
step s2i: <... completed>
step s2c: COMMIT;
step s2s: SELECT * FROM tpart;
i|t
--+------
5|text05
1|text01
15|text15
25|text25
35|text35
(5 rows)
starting permutation: s1brr s1splt s2bs s2i s1c s2c s2s
step s1brr: BEGIN ISOLATION LEVEL REPEATABLE READ;
step s1splt: ALTER TABLE tpart SPLIT PARTITION tpart_10_20 INTO
(PARTITION tpart_10_15 FOR VALUES FROM (10) TO (15),
PARTITION tpart_15_20 FOR VALUES FROM (15) TO (20));
step s2bs: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s2i: INSERT INTO tpart VALUES (1, 'text01'); <waiting ...>
step s1c: COMMIT;
step s2i: <... completed>
step s2c: COMMIT;
step s2s: SELECT * FROM tpart;
i|t
--+------
5|text05
1|text01
15|text15
25|text25
35|text35
(5 rows)
starting permutation: s1bs s1splt s2b s2i s1c s2c s2s
step s1bs: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s1splt: ALTER TABLE tpart SPLIT PARTITION tpart_10_20 INTO
(PARTITION tpart_10_15 FOR VALUES FROM (10) TO (15),
PARTITION tpart_15_20 FOR VALUES FROM (15) TO (20));
step s2b: BEGIN;
step s2i: INSERT INTO tpart VALUES (1, 'text01'); <waiting ...>
step s1c: COMMIT;
step s2i: <... completed>
step s2c: COMMIT;
step s2s: SELECT * FROM tpart;
i|t
--+------
5|text05
1|text01
15|text15
25|text25
35|text35
(5 rows)
starting permutation: s1bs s1splt s2brr s2i s1c s2c s2s
step s1bs: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s1splt: ALTER TABLE tpart SPLIT PARTITION tpart_10_20 INTO
(PARTITION tpart_10_15 FOR VALUES FROM (10) TO (15),
PARTITION tpart_15_20 FOR VALUES FROM (15) TO (20));
step s2brr: BEGIN ISOLATION LEVEL REPEATABLE READ;
step s2i: INSERT INTO tpart VALUES (1, 'text01'); <waiting ...>
step s1c: COMMIT;
step s2i: <... completed>
step s2c: COMMIT;
step s2s: SELECT * FROM tpart;
i|t
--+------
5|text05
1|text01
15|text15
25|text25
35|text35
(5 rows)
starting permutation: s1bs s1splt s2bs s2i s1c s2c s2s
step s1bs: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s1splt: ALTER TABLE tpart SPLIT PARTITION tpart_10_20 INTO
(PARTITION tpart_10_15 FOR VALUES FROM (10) TO (15),
PARTITION tpart_15_20 FOR VALUES FROM (15) TO (20));
step s2bs: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s2i: INSERT INTO tpart VALUES (1, 'text01'); <waiting ...>
step s1c: COMMIT;
step s2i: <... completed>
step s2c: COMMIT;
step s2s: SELECT * FROM tpart;
i|t
--+------
5|text05
1|text01
15|text15
25|text25
35|text35
(5 rows)

1
src/test/isolation/isolation_schedule
View File

@ -104,6 +104,7 @@ test: partition-key-update-2
test: partition-key-update-3
test: partition-key-update-4
test: partition-merge
test: partition-split
test: plpgsql-toast
test: cluster-conflict
test: cluster-conflict-partition

54
src/test/isolation/specs/partition-split.spec Normal file
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@ -0,0 +1,54 @@
# Verify that SPLIT operation locks DML operations with partitioned table
setup
{
DROP TABLE IF EXISTS tpart;
CREATE TABLE tpart(i int, t text) partition by range(i);
CREATE TABLE tpart_00_10 PARTITION OF tpart FOR VALUES FROM (0) TO (10);
CREATE TABLE tpart_10_20 PARTITION OF tpart FOR VALUES FROM (10) TO (20);
CREATE TABLE tpart_20_30 PARTITION OF tpart FOR VALUES FROM (20) TO (30);
CREATE TABLE tpart_default PARTITION OF tpart DEFAULT;
INSERT INTO tpart VALUES (5, 'text05');
INSERT INTO tpart VALUES (15, 'text15');
INSERT INTO tpart VALUES (25, 'text25');
INSERT INTO tpart VALUES (35, 'text35');
}
teardown
{
DROP TABLE tpart;
}
session s1
step s1b { BEGIN; }
step s1brr { BEGIN ISOLATION LEVEL REPEATABLE READ; }
step s1bs { BEGIN ISOLATION LEVEL SERIALIZABLE; }
step s1splt { ALTER TABLE tpart SPLIT PARTITION tpart_10_20 INTO
(PARTITION tpart_10_15 FOR VALUES FROM (10) TO (15),
PARTITION tpart_15_20 FOR VALUES FROM (15) TO (20)); }
step s1c { COMMIT; }
session s2
step s2b { BEGIN; }
step s2brr { BEGIN ISOLATION LEVEL REPEATABLE READ; }
step s2bs { BEGIN ISOLATION LEVEL SERIALIZABLE; }
step s2i { INSERT INTO tpart VALUES (1, 'text01'); }
step s2c { COMMIT; }
step s2s { SELECT * FROM tpart; }
# s1 starts SPLIT PARTITION then s2 trying to insert row and
# waits until s1 finished SPLIT operation.
permutation s1b s1splt s2b s2i s1c s2c s2s
permutation s1b s1splt s2brr s2i s1c s2c s2s
permutation s1b s1splt s2bs s2i s1c s2c s2s
permutation s1brr s1splt s2b s2i s1c s2c s2s
permutation s1brr s1splt s2brr s2i s1c s2c s2s
permutation s1brr s1splt s2bs s2i s1c s2c s2s
permutation s1bs s1splt s2b s2i s1c s2c s2s
permutation s1bs s1splt s2brr s2i s1c s2c s2s
permutation s1bs s1splt s2bs s2i s1c s2c s2s

3
src/test/modules/test_ddl_deparse/test_ddl_deparse.c
View File

@ -300,6 +300,9 @@ get_altertable_subcmdinfo(PG_FUNCTION_ARGS)
case AT_DetachPartitionFinalize:
strtype = "DETACH PARTITION ... FINALIZE";
break;
case AT_SplitPartition:
strtype = "SPLIT PARTITION";
break;
case AT_MergePartitions:
strtype = "MERGE PARTITIONS";
break;

1417
src/test/regress/expected/partition_split.out Normal file
View File

File diff suppressed because it is too large Load Diff

2
src/test/regress/parallel_schedule
View File

@ -119,7 +119,7 @@ test: plancache limit plpgsql copy2 temp domain rangefuncs prepare conversion tr
# The stats test resets stats, so nothing else needing stats access can be in
# this group.
# ----------
test: partition_merge partition_join partition_prune reloptions hash_part indexing partition_aggregate partition_info tuplesort explain compression memoize stats predicate
test: partition_merge partition_split partition_join partition_prune reloptions hash_part indexing partition_aggregate partition_info tuplesort explain compression memoize stats predicate
# event_trigger depends on create_am and cannot run concurrently with
# any test that runs DDL

833
src/test/regress/sql/partition_split.sql Normal file
View File

@ -0,0 +1,833 @@
--
-- PARTITION_SPLIT
-- Tests for "ALTER TABLE ... SPLIT PARTITION ..." command
--
CREATE SCHEMA partition_split_schema;
SET search_path = partition_split_schema, public;
--
-- BY RANGE partitioning
--
--
-- Test for error codes
--
CREATE TABLE sales_range (salesman_id int, salesman_name varchar(30), sales_amount int, sales_date date) PARTITION BY RANGE (sales_date);
CREATE TABLE sales_jan2022 PARTITION OF sales_range FOR VALUES FROM ('2022-01-01') TO ('2022-02-01');
CREATE TABLE sales_feb_mar_apr2022 PARTITION OF sales_range FOR VALUES FROM ('2022-02-01') TO ('2022-05-01');
CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
-- ERROR: relation "sales_xxx" does not exist
ALTER TABLE sales_range SPLIT PARTITION sales_xxx INTO
(PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
-- ERROR: relation "sales_jan2022" already exists
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_jan2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
-- ERROR: invalid bound specification for a range partition
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_jan2022 FOR VALUES IN ('2022-05-01', '2022-06-01'),
PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
-- ERROR: empty range bound specified for partition "sales_mar2022"
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-02-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
--ERROR: list of split partitions should contains at least two items
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-10-01'));
-- ERROR: lower bound of partition "sales_feb2022" is less than lower bound of split partition
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_feb2022 FOR VALUES FROM ('2022-01-01') TO ('2022-03-01'),
PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
-- ERROR: name "sales_feb_mar_apr2022" already used
-- (We can create partition with the same name as split partition, but can't create two partitions with the same name)
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_feb_mar_apr2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_feb_mar_apr2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
-- ERROR: name "sales_feb2022" already used
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_feb2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
-- ERROR: "sales_feb_mar_apr2022" is not a partitioned table
ALTER TABLE sales_feb_mar_apr2022 SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_jan2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_feb2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
-- ERROR: upper bound of partition "sales_apr2022" is greater than upper bound of split partition
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-06-01'));
-- ERROR: lower bound of partition "sales_mar2022" is not equals to upper bound of previous partition
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_mar2022 FOR VALUES FROM ('2022-02-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
-- Tests for spaces between partitions, them should be executed without DEFAULT partition
ALTER TABLE sales_range DETACH PARTITION sales_others;
-- ERROR: lower bound of partition "sales_feb2022" is not equals to lower bound of split partition
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-02') TO ('2022-03-01'),
PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
DROP TABLE sales_range;
DROP TABLE sales_others;
--
-- Add rows into partitioned table then split partition
--
CREATE TABLE sales_range (salesman_id INT, salesman_name VARCHAR(30), sales_amount INT, sales_date DATE) PARTITION BY RANGE (sales_date);
CREATE TABLE sales_jan2022 PARTITION OF sales_range FOR VALUES FROM ('2022-01-01') TO ('2022-02-01');
CREATE TABLE sales_feb_mar_apr2022 PARTITION OF sales_range FOR VALUES FROM ('2022-02-01') TO ('2022-05-01');
CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
INSERT INTO sales_range VALUES (1, 'May', 1000, '2022-01-31');
INSERT INTO sales_range VALUES (2, 'Smirnoff', 500, '2022-02-10');
INSERT INTO sales_range VALUES (3, 'Ford', 2000, '2022-04-30');
INSERT INTO sales_range VALUES (4, 'Ivanov', 750, '2022-04-13');
INSERT INTO sales_range VALUES (5, 'Deev', 250, '2022-04-07');
INSERT INTO sales_range VALUES (6, 'Poirot', 150, '2022-02-11');
INSERT INTO sales_range VALUES (7, 'Li', 175, '2022-03-08');
INSERT INTO sales_range VALUES (8, 'Ericsson', 185, '2022-02-23');
INSERT INTO sales_range VALUES (9, 'Muller', 250, '2022-03-11');
INSERT INTO sales_range VALUES (10, 'Halder', 350, '2022-01-28');
INSERT INTO sales_range VALUES (11, 'Trump', 380, '2022-04-06');
INSERT INTO sales_range VALUES (12, 'Plato', 350, '2022-03-19');
INSERT INTO sales_range VALUES (13, 'Gandi', 377, '2022-01-09');
INSERT INTO sales_range VALUES (14, 'Smith', 510, '2022-05-04');
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
SELECT * FROM sales_range;
SELECT * FROM sales_jan2022;
SELECT * FROM sales_feb2022;
SELECT * FROM sales_mar2022;
SELECT * FROM sales_apr2022;
SELECT * FROM sales_others;
DROP TABLE sales_range CASCADE;
--
-- Add split partition then add rows into partitioned table
--
CREATE TABLE sales_range (salesman_id INT, salesman_name VARCHAR(30), sales_amount INT, sales_date DATE) PARTITION BY RANGE (sales_date);
CREATE TABLE sales_jan2022 PARTITION OF sales_range FOR VALUES FROM ('2022-01-01') TO ('2022-02-01');
CREATE TABLE sales_feb_mar_apr2022 PARTITION OF sales_range FOR VALUES FROM ('2022-02-01') TO ('2022-05-01');
CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
INSERT INTO sales_range VALUES (1, 'May', 1000, '2022-01-31');
INSERT INTO sales_range VALUES (2, 'Smirnoff', 500, '2022-02-10');
INSERT INTO sales_range VALUES (3, 'Ford', 2000, '2022-04-30');
INSERT INTO sales_range VALUES (4, 'Ivanov', 750, '2022-04-13');
INSERT INTO sales_range VALUES (5, 'Deev', 250, '2022-04-07');
INSERT INTO sales_range VALUES (6, 'Poirot', 150, '2022-02-11');
INSERT INTO sales_range VALUES (7, 'Li', 175, '2022-03-08');
INSERT INTO sales_range VALUES (8, 'Ericsson', 185, '2022-02-23');
INSERT INTO sales_range VALUES (9, 'Muller', 250, '2022-03-11');
INSERT INTO sales_range VALUES (10, 'Halder', 350, '2022-01-28');
INSERT INTO sales_range VALUES (11, 'Trump', 380, '2022-04-06');
INSERT INTO sales_range VALUES (12, 'Plato', 350, '2022-03-19');
INSERT INTO sales_range VALUES (13, 'Gandi', 377, '2022-01-09');
INSERT INTO sales_range VALUES (14, 'Smith', 510, '2022-05-04');
SELECT * FROM sales_range;
SELECT * FROM sales_jan2022;
SELECT * FROM sales_feb2022;
SELECT * FROM sales_mar2022;
SELECT * FROM sales_apr2022;
SELECT * FROM sales_others;
DROP TABLE sales_range CASCADE;
--
-- Test for:
-- * composite partition key;
-- * GENERATED column;
-- * column with DEFAULT value.
--
CREATE TABLE sales_date (salesman_name VARCHAR(30), sales_year INT, sales_month INT, sales_day INT,
sales_date VARCHAR(10) GENERATED ALWAYS AS
(LPAD(sales_year::text, 4, '0') || '.' || LPAD(sales_month::text, 2, '0') || '.' || LPAD(sales_day::text, 2, '0')) STORED,
sales_department VARCHAR(30) DEFAULT 'Sales department')
PARTITION BY RANGE (sales_year, sales_month, sales_day);
CREATE TABLE sales_dec2022 PARTITION OF sales_date FOR VALUES FROM (2021, 12, 1) TO (2022, 1, 1);
CREATE TABLE sales_jan_feb2022 PARTITION OF sales_date FOR VALUES FROM (2022, 1, 1) TO (2022, 3, 1);
CREATE TABLE sales_other PARTITION OF sales_date FOR VALUES FROM (2022, 3, 1) TO (MAXVALUE, MAXVALUE, MAXVALUE);
INSERT INTO sales_date(salesman_name, sales_year, sales_month, sales_day) VALUES ('Manager1', 2021, 12, 7);
INSERT INTO sales_date(salesman_name, sales_year, sales_month, sales_day) VALUES ('Manager2', 2021, 12, 8);
INSERT INTO sales_date(salesman_name, sales_year, sales_month, sales_day) VALUES ('Manager3', 2022, 1, 1);
INSERT INTO sales_date(salesman_name, sales_year, sales_month, sales_day) VALUES ('Manager1', 2022, 2, 4);
INSERT INTO sales_date(salesman_name, sales_year, sales_month, sales_day) VALUES ('Manager2', 2022, 1, 2);
INSERT INTO sales_date(salesman_name, sales_year, sales_month, sales_day) VALUES ('Manager3', 2022, 2, 1);
INSERT INTO sales_date(salesman_name, sales_year, sales_month, sales_day) VALUES ('Manager1', 2022, 3, 3);
INSERT INTO sales_date(salesman_name, sales_year, sales_month, sales_day) VALUES ('Manager2', 2022, 3, 4);
INSERT INTO sales_date(salesman_name, sales_year, sales_month, sales_day) VALUES ('Manager3', 2022, 5, 1);
SELECT * FROM sales_date;
SELECT * FROM sales_dec2022;
SELECT * FROM sales_jan_feb2022;
SELECT * FROM sales_other;
ALTER TABLE sales_date SPLIT PARTITION sales_jan_feb2022 INTO
(PARTITION sales_jan2022 FOR VALUES FROM (2022, 1, 1) TO (2022, 2, 1),
PARTITION sales_feb2022 FOR VALUES FROM (2022, 2, 1) TO (2022, 3, 1));
INSERT INTO sales_date(salesman_name, sales_year, sales_month, sales_day) VALUES ('Manager1', 2022, 1, 10);
INSERT INTO sales_date(salesman_name, sales_year, sales_month, sales_day) VALUES ('Manager2', 2022, 2, 10);
SELECT * FROM sales_date;
SELECT * FROM sales_dec2022;
SELECT * FROM sales_jan2022;
SELECT * FROM sales_feb2022;
SELECT * FROM sales_other;
--ERROR: relation "sales_jan_feb2022" does not exist
SELECT * FROM sales_jan_feb2022;
DROP TABLE sales_date CASCADE;
--
-- Test: split DEFAULT partition; using a index on partition key; check index after split
--
CREATE TABLE sales_range (salesman_id INT, salesman_name VARCHAR(30), sales_amount INT, sales_date DATE) PARTITION BY RANGE (sales_date);
CREATE TABLE sales_jan2022 PARTITION OF sales_range FOR VALUES FROM ('2022-01-01') TO ('2022-02-01');
CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
CREATE INDEX sales_range_sales_date_idx ON sales_range USING btree (sales_date);
INSERT INTO sales_range VALUES (1, 'May', 1000, '2022-01-31');
INSERT INTO sales_range VALUES (2, 'Smirnoff', 500, '2022-02-10');
INSERT INTO sales_range VALUES (3, 'Ford', 2000, '2022-04-30');
INSERT INTO sales_range VALUES (4, 'Ivanov', 750, '2022-04-13');
INSERT INTO sales_range VALUES (5, 'Deev', 250, '2022-04-07');
INSERT INTO sales_range VALUES (6, 'Poirot', 150, '2022-02-11');
INSERT INTO sales_range VALUES (7, 'Li', 175, '2022-03-08');
INSERT INTO sales_range VALUES (8, 'Ericsson', 185, '2022-02-23');
INSERT INTO sales_range VALUES (9, 'Muller', 250, '2022-03-11');
INSERT INTO sales_range VALUES (10, 'Halder', 350, '2022-01-28');
INSERT INTO sales_range VALUES (11, 'Trump', 380, '2022-04-06');
INSERT INTO sales_range VALUES (12, 'Plato', 350, '2022-03-19');
INSERT INTO sales_range VALUES (13, 'Gandi', 377, '2022-01-09');
INSERT INTO sales_range VALUES (14, 'Smith', 510, '2022-05-04');
SELECT * FROM sales_others;
SELECT * FROM pg_indexes WHERE tablename = 'sales_others' and schemaname = 'partition_split_schema';
ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
(PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'),
PARTITION sales_others DEFAULT);
-- Use indexscan for test indexes
SET enable_indexscan = ON;
SET enable_seqscan = OFF;
SELECT * FROM sales_feb2022 where sales_date > '2022-01-01';
SELECT * FROM sales_mar2022 where sales_date > '2022-01-01';
SELECT * FROM sales_apr2022 where sales_date > '2022-01-01';
SELECT * FROM sales_others where sales_date > '2022-01-01';
SET enable_indexscan = ON;
SET enable_seqscan = ON;
SELECT * FROM pg_indexes WHERE tablename = 'sales_feb2022' and schemaname = 'partition_split_schema';
SELECT * FROM pg_indexes WHERE tablename = 'sales_mar2022' and schemaname = 'partition_split_schema';
SELECT * FROM pg_indexes WHERE tablename = 'sales_apr2022' and schemaname = 'partition_split_schema';
SELECT * FROM pg_indexes WHERE tablename = 'sales_others' and schemaname = 'partition_split_schema';
DROP TABLE sales_range CASCADE;
--
-- Test: some cases for split DEFAULT partition (different bounds)
--
CREATE TABLE sales_range (salesman_id INT, salesman_name VARCHAR(30), sales_amount INT, sales_date INT) PARTITION BY RANGE (sales_date);
CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
-- sales_error intersects with sales_dec2022 (lower bound)
-- ERROR: lower bound of partition "sales_error" conflicts with upper bound of previous partition "sales_dec2022"
ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
(PARTITION sales_dec2022 FOR VALUES FROM (20211201) TO (20220101),
PARTITION sales_error FOR VALUES FROM (20211230) TO (20220201),
PARTITION sales_feb2022 FOR VALUES FROM (20220201) TO (20220301),
PARTITION sales_others DEFAULT);
-- sales_error intersects with sales_feb2022 (upper bound)
-- ERROR: lower bound of partition "sales_feb2022" conflicts with upper bound of previous partition "sales_error"
ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
(PARTITION sales_dec2022 FOR VALUES FROM (20211201) TO (20220101),
PARTITION sales_error FOR VALUES FROM (20220101) TO (20220202),
PARTITION sales_feb2022 FOR VALUES FROM (20220201) TO (20220301),
PARTITION sales_others DEFAULT);
-- sales_error intersects with sales_dec2022 (inside bound)
-- ERROR: lower bound of partition "sales_error" conflicts with upper bound of previous partition "sales_dec2022"
ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
(PARTITION sales_dec2022 FOR VALUES FROM (20211201) TO (20220101),
PARTITION sales_error FOR VALUES FROM (20211210) TO (20211220),
PARTITION sales_feb2022 FOR VALUES FROM (20220201) TO (20220301),
PARTITION sales_others DEFAULT);
-- sales_error intersects with sales_dec2022 (exact the same bounds)
-- ERROR: lower bound of partition "sales_error" conflicts with upper bound of previous partition "sales_dec2022"
ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
(PARTITION sales_dec2022 FOR VALUES FROM (20211201) TO (20220101),
PARTITION sales_error FOR VALUES FROM (20211201) TO (20220101),
PARTITION sales_feb2022 FOR VALUES FROM (20220201) TO (20220301),
PARTITION sales_others DEFAULT);
-- ERROR: any partition in the list should be DEFAULT because split partition is DEFAULT
ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
(PARTITION sales_dec2022 FOR VALUES FROM (20211201) TO (20220101),
PARTITION sales_jan2022 FOR VALUES FROM (20220101) TO (20220201),
PARTITION sales_feb2022 FOR VALUES FROM (20220201) TO (20220301));
-- no error: bounds of sales_noerror between sales_dec2022 and sales_feb2022
ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
(PARTITION sales_dec2022 FOR VALUES FROM (20211201) TO (20220101),
PARTITION sales_noerror FOR VALUES FROM (20220110) TO (20220120),
PARTITION sales_feb2022 FOR VALUES FROM (20220201) TO (20220301),
PARTITION sales_others DEFAULT);
DROP TABLE sales_range;
CREATE TABLE sales_range (salesman_id INT, salesman_name VARCHAR(30), sales_amount INT, sales_date INT) PARTITION BY RANGE (sales_date);
CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
-- no error: bounds of sales_noerror equals to lower and upper bounds of sales_dec2022 and sales_feb2022
ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
(PARTITION sales_dec2022 FOR VALUES FROM (20211201) TO (20220101),
PARTITION sales_noerror FOR VALUES FROM (20210101) TO (20210201),
PARTITION sales_feb2022 FOR VALUES FROM (20220201) TO (20220301),
PARTITION sales_others DEFAULT);
DROP TABLE sales_range;
--
-- Test: split partition with CHECK and FOREIGN KEY CONSTRAINTs on partitioned table
--
CREATE TABLE salesmans(salesman_id INT PRIMARY KEY, salesman_name VARCHAR(30));
INSERT INTO salesmans VALUES (1, 'Poirot');
CREATE TABLE sales_range (
salesman_id INT REFERENCES salesmans(salesman_id),
sales_amount INT CHECK (sales_amount > 1),
sales_date DATE) PARTITION BY RANGE (sales_date);
CREATE TABLE sales_jan2022 PARTITION OF sales_range FOR VALUES FROM ('2022-01-01') TO ('2022-02-01');
CREATE TABLE sales_feb_mar_apr2022 PARTITION OF sales_range FOR VALUES FROM ('2022-02-01') TO ('2022-05-01');
CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conrelid = 'sales_feb_mar_apr2022'::regclass::oid;
ALTER TABLE sales_range SPLIT PARTITION sales_feb_mar_apr2022 INTO
(PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_mar2022 FOR VALUES FROM ('2022-03-01') TO ('2022-04-01'),
PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'));
-- We should see the same CONSTRAINTs as on sales_feb_mar_apr2022 partition
SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conrelid = 'sales_feb2022'::regclass::oid;
SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conrelid = 'sales_mar2022'::regclass::oid;
SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conrelid = 'sales_apr2022'::regclass::oid;
-- ERROR: new row for relation "sales_mar2022" violates check constraint "sales_range_salesman_id_check"
INSERT INTO sales_range VALUES (1, 0, '2022-03-11');
-- ERROR: insert or update on table "sales_mar2022" violates foreign key constraint "sales_range_salesman_id_fkey"
INSERT INTO sales_range VALUES (-1, 10, '2022-03-11');
-- ok
INSERT INTO sales_range VALUES (1, 10, '2022-03-11');
DROP TABLE sales_range CASCADE;
DROP TABLE salesmans CASCADE;
--
-- Test: split partition on partitioned table in case exists FOREIGN KEY reference from another table
--
CREATE TABLE salesmans(salesman_id INT PRIMARY KEY, salesman_name VARCHAR(30)) PARTITION BY RANGE (salesman_id);
CREATE TABLE sales (salesman_id INT REFERENCES salesmans(salesman_id), sales_amount INT, sales_date DATE);
CREATE TABLE salesmans01_10 PARTITION OF salesmans FOR VALUES FROM (1) TO (10);
CREATE TABLE salesmans10_40 PARTITION OF salesmans FOR VALUES FROM (10) TO (40);
INSERT INTO salesmans VALUES (1, 'Poirot');
INSERT INTO salesmans VALUES (10, 'May');
INSERT INTO salesmans VALUES (19, 'Ivanov');
INSERT INTO salesmans VALUES (20, 'Smirnoff');
INSERT INTO salesmans VALUES (30, 'Ford');
INSERT INTO sales VALUES (1, 100, '2022-03-01');
INSERT INTO sales VALUES (1, 110, '2022-03-02');
INSERT INTO sales VALUES (10, 150, '2022-03-01');
INSERT INTO sales VALUES (10, 90, '2022-03-03');
INSERT INTO sales VALUES (19, 200, '2022-03-04');
INSERT INTO sales VALUES (20, 50, '2022-03-12');
INSERT INTO sales VALUES (20, 170, '2022-03-02');
INSERT INTO sales VALUES (30, 30, '2022-03-04');
SELECT * FROM salesmans01_10;
SELECT * FROM salesmans10_40;
ALTER TABLE salesmans SPLIT PARTITION salesmans10_40 INTO
(PARTITION salesmans10_20 FOR VALUES FROM (10) TO (20),
PARTITION salesmans20_30 FOR VALUES FROM (20) TO (30),
PARTITION salesmans30_40 FOR VALUES FROM (30) TO (40));
SELECT * FROM salesmans01_10;
SELECT * FROM salesmans10_20;
SELECT * FROM salesmans20_30;
SELECT * FROM salesmans30_40;
-- ERROR: insert or update on table "sales" violates foreign key constraint "sales_salesman_id_fkey"
INSERT INTO sales VALUES (40, 50, '2022-03-04');
-- ok
INSERT INTO sales VALUES (30, 50, '2022-03-04');
DROP TABLE sales CASCADE;
DROP TABLE salesmans CASCADE;
--
-- Test: split partition of partitioned table with triggers
--
CREATE TABLE salesmans(salesman_id INT PRIMARY KEY, salesman_name VARCHAR(30)) PARTITION BY RANGE (salesman_id);
CREATE TABLE salesmans01_10 PARTITION OF salesmans FOR VALUES FROM (1) TO (10);
CREATE TABLE salesmans10_40 PARTITION OF salesmans FOR VALUES FROM (10) TO (40);
INSERT INTO salesmans VALUES (1, 'Poirot');
CREATE OR REPLACE FUNCTION after_insert_row_trigger() RETURNS trigger LANGUAGE 'plpgsql' AS $BODY$
BEGIN
RAISE NOTICE 'trigger(%) called: action = %, when = %, level = %', TG_ARGV[0], TG_OP, TG_WHEN, TG_LEVEL;
RETURN NULL;
END;
$BODY$;
CREATE TRIGGER salesmans_after_insert_statement_trigger
AFTER INSERT
ON salesmans
FOR EACH STATEMENT
EXECUTE PROCEDURE after_insert_row_trigger('salesmans');
CREATE TRIGGER salesmans_after_insert_row_trigger
AFTER INSERT
ON salesmans
FOR EACH ROW
EXECUTE PROCEDURE after_insert_row_trigger('salesmans');
-- 2 triggers should fire here (row + statement):
INSERT INTO salesmans VALUES (10, 'May');
-- 1 trigger should fire here (row):
INSERT INTO salesmans10_40 VALUES (19, 'Ivanov');
ALTER TABLE salesmans SPLIT PARTITION salesmans10_40 INTO
(PARTITION salesmans10_20 FOR VALUES FROM (10) TO (20),
PARTITION salesmans20_30 FOR VALUES FROM (20) TO (30),
PARTITION salesmans30_40 FOR VALUES FROM (30) TO (40));
-- 2 triggers should fire here (row + statement):
INSERT INTO salesmans VALUES (20, 'Smirnoff');
-- 1 trigger should fire here (row):
INSERT INTO salesmans30_40 VALUES (30, 'Ford');
SELECT * FROM salesmans01_10;
SELECT * FROM salesmans10_20;
SELECT * FROM salesmans20_30;
SELECT * FROM salesmans30_40;
DROP TABLE salesmans CASCADE;
DROP FUNCTION after_insert_row_trigger();
--
-- Test: split partition witch identity column
-- If split partition column is identity-column, columns of new partitions are identity-columns too.
--
CREATE TABLE salesmans(salesman_id INT GENERATED ALWAYS AS IDENTITY PRIMARY KEY, salesman_name VARCHAR(30)) PARTITION BY RANGE (salesman_id);
CREATE TABLE salesmans1_2 PARTITION OF salesmans FOR VALUES FROM (1) TO (2);
-- Create new partition with identity-column:
CREATE TABLE salesmans2_5(salesman_id INT NOT NULL, salesman_name VARCHAR(30));
ALTER TABLE salesmans ATTACH PARTITION salesmans2_5 FOR VALUES FROM (2) TO (5);
INSERT INTO salesmans (salesman_name) VALUES ('Poirot');
INSERT INTO salesmans (salesman_name) VALUES ('Ivanov');
SELECT attname, attidentity, attgenerated FROM pg_attribute WHERE attnum > 0 AND attrelid = 'salesmans'::regclass::oid;
SELECT attname, attidentity, attgenerated FROM pg_attribute WHERE attnum > 0 AND attrelid = 'salesmans1_2'::regclass::oid;
-- Split partition has identity-column:
SELECT attname, attidentity, attgenerated FROM pg_attribute WHERE attnum > 0 AND attrelid = 'salesmans2_5'::regclass::oid;
ALTER TABLE salesmans SPLIT PARTITION salesmans2_5 INTO
(PARTITION salesmans2_3 FOR VALUES FROM (2) TO (3),
PARTITION salesmans3_4 FOR VALUES FROM (3) TO (4),
PARTITION salesmans4_5 FOR VALUES FROM (4) TO (5));
INSERT INTO salesmans (salesman_name) VALUES ('May');
INSERT INTO salesmans (salesman_name) VALUES ('Ford');
SELECT * FROM salesmans1_2;
SELECT * FROM salesmans2_3;
SELECT * FROM salesmans3_4;
SELECT * FROM salesmans4_5;
SELECT attname, attidentity, attgenerated FROM pg_attribute WHERE attnum > 0 AND attrelid = 'salesmans'::regclass::oid;
SELECT attname, attidentity, attgenerated FROM pg_attribute WHERE attnum > 0 AND attrelid = 'salesmans1_2'::regclass::oid;
-- New partitions have identity-columns:
SELECT attname, attidentity, attgenerated FROM pg_attribute WHERE attnum > 0 AND attrelid = 'salesmans2_3'::regclass::oid;
SELECT attname, attidentity, attgenerated FROM pg_attribute WHERE attnum > 0 AND attrelid = 'salesmans3_4'::regclass::oid;
SELECT attname, attidentity, attgenerated FROM pg_attribute WHERE attnum > 0 AND attrelid = 'salesmans4_5'::regclass::oid;
DROP TABLE salesmans CASCADE;
--
-- Test: split partition with deleted columns
--
CREATE TABLE salesmans(salesman_id INT PRIMARY KEY, salesman_name VARCHAR(30)) PARTITION BY RANGE (salesman_id);
CREATE TABLE salesmans01_10 PARTITION OF salesmans FOR VALUES FROM (1) TO (10);
-- Create new partition with some deleted columns:
CREATE TABLE salesmans10_40(d1 VARCHAR(30), salesman_id INT PRIMARY KEY, d2 INT, d3 DATE, salesman_name VARCHAR(30));
INSERT INTO salesmans10_40 VALUES ('dummy value 1', 19, 100, now(), 'Ivanov');
INSERT INTO salesmans10_40 VALUES ('dummy value 2', 20, 101, now(), 'Smirnoff');
ALTER TABLE salesmans10_40 DROP COLUMN d1;
ALTER TABLE salesmans10_40 DROP COLUMN d2;
ALTER TABLE salesmans10_40 DROP COLUMN d3;
ALTER TABLE salesmans ATTACH PARTITION salesmans10_40 FOR VALUES FROM (10) TO (40);
INSERT INTO salesmans VALUES (1, 'Poirot');
INSERT INTO salesmans VALUES (10, 'May');
INSERT INTO salesmans VALUES (30, 'Ford');
ALTER TABLE salesmans SPLIT PARTITION salesmans10_40 INTO
(PARTITION salesmans10_20 FOR VALUES FROM (10) TO (20),
PARTITION salesmans20_30 FOR VALUES FROM (20) TO (30),
PARTITION salesmans30_40 FOR VALUES FROM (30) TO (40));
select * from salesmans01_10;
select * from salesmans10_20;
select * from salesmans20_30;
select * from salesmans30_40;
DROP TABLE salesmans CASCADE;
--
-- Test: split sub-partition
--
CREATE TABLE sales_range (salesman_id INT, salesman_name VARCHAR(30), sales_amount INT, sales_date DATE) PARTITION BY RANGE (sales_date);
CREATE TABLE sales_jan2022 PARTITION OF sales_range FOR VALUES FROM ('2022-01-01') TO ('2022-02-01');
CREATE TABLE sales_feb2022 PARTITION OF sales_range FOR VALUES FROM ('2022-02-01') TO ('2022-03-01');
CREATE TABLE sales_mar2022 PARTITION OF sales_range FOR VALUES FROM ('2022-03-01') TO ('2022-04-01');
CREATE TABLE sales_apr2022 (salesman_id INT, salesman_name VARCHAR(30), sales_amount INT, sales_date DATE) PARTITION BY RANGE (sales_date);
CREATE TABLE sales_apr_all PARTITION OF sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01');
ALTER TABLE sales_range ATTACH PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01');
CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
CREATE INDEX sales_range_sales_date_idx ON sales_range USING btree (sales_date);
INSERT INTO sales_range VALUES (1, 'May', 1000, '2022-01-31');
INSERT INTO sales_range VALUES (2, 'Smirnoff', 500, '2022-02-10');
INSERT INTO sales_range VALUES (3, 'Ford', 2000, '2022-04-30');
INSERT INTO sales_range VALUES (4, 'Ivanov', 750, '2022-04-13');
INSERT INTO sales_range VALUES (5, 'Deev', 250, '2022-04-07');
INSERT INTO sales_range VALUES (6, 'Poirot', 150, '2022-02-11');
INSERT INTO sales_range VALUES (7, 'Li', 175, '2022-03-08');
INSERT INTO sales_range VALUES (8, 'Ericsson', 185, '2022-02-23');
INSERT INTO sales_range VALUES (9, 'Muller', 250, '2022-03-11');
INSERT INTO sales_range VALUES (10, 'Halder', 350, '2022-01-28');
INSERT INTO sales_range VALUES (11, 'Trump', 380, '2022-04-06');
INSERT INTO sales_range VALUES (12, 'Plato', 350, '2022-03-19');
INSERT INTO sales_range VALUES (13, 'Gandi', 377, '2022-01-09');
INSERT INTO sales_range VALUES (14, 'Smith', 510, '2022-05-04');
SELECT * FROM sales_range;
SELECT * FROM sales_apr2022;
ALTER TABLE sales_apr2022 SPLIT PARTITION sales_apr_all INTO
(PARTITION sales_apr2022_01_10 FOR VALUES FROM ('2022-04-01') TO ('2022-04-10'),
PARTITION sales_apr2022_10_20 FOR VALUES FROM ('2022-04-10') TO ('2022-04-20'),
PARTITION sales_apr2022_20_30 FOR VALUES FROM ('2022-04-20') TO ('2022-05-01'));
SELECT * FROM sales_range;
SELECT * FROM sales_apr2022;
SELECT * FROM sales_apr2022_01_10;
SELECT * FROM sales_apr2022_10_20;
SELECT * FROM sales_apr2022_20_30;
DROP TABLE sales_range;
--
-- BY LIST partitioning
--
--
-- Test: specific errors for BY LIST partitioning
--
CREATE TABLE sales_list
(salesman_id INT,
salesman_name VARCHAR(30),
sales_state VARCHAR(20),
sales_amount INT,
sales_date DATE)
PARTITION BY LIST (sales_state);
CREATE TABLE sales_nord PARTITION OF sales_list FOR VALUES IN ('Oslo', 'St. Petersburg', 'Helsinki');
CREATE TABLE sales_all PARTITION OF sales_list FOR VALUES IN ('Warsaw', 'Lisbon', 'New York', 'Madrid', 'Bejing', 'Berlin', 'Delhi', 'Kyiv', 'Vladivostok');
CREATE TABLE sales_others PARTITION OF sales_list DEFAULT;
-- ERROR: partition "sales_east" would overlap partition "sales_nord"
ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
(PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
PARTITION sales_east FOR VALUES IN ('Bejing', 'Delhi', 'Vladivostok', 'Helsinki'),
PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Kyiv'));
-- ERROR: new partition "sales_west" would overlap with another new partition "sales_central"
ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
(PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
PARTITION sales_east FOR VALUES IN ('Bejing', 'Delhi', 'Vladivostok'),
PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Lisbon', 'Kyiv'));
-- ERROR: new partition "sales_west" cannot have NULL value because split partition does not have
ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
(PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid', NULL),
PARTITION sales_east FOR VALUES IN ('Bejing', 'Delhi', 'Vladivostok'),
PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Kyiv'));
DROP TABLE sales_list;
--
-- Test: two specific errors for BY LIST partitioning:
-- * new partitions not has NULL value that split partition has.
-- * new partitions not has a value that split partition has.
--
CREATE TABLE sales_list
(salesman_id INT,
salesman_name VARCHAR(30),
sales_state VARCHAR(20),
sales_amount INT,
sales_date DATE)
PARTITION BY LIST (sales_state);
CREATE TABLE sales_nord PARTITION OF sales_list FOR VALUES IN ('Helsinki', 'St. Petersburg', 'Oslo');
CREATE TABLE sales_all PARTITION OF sales_list FOR VALUES IN ('Warsaw', 'Lisbon', 'New York', 'Madrid', 'Bejing', 'Berlin', 'Delhi', 'Kyiv', 'Vladivostok', NULL);
-- ERROR: new partitions not have value NULL but split partition has
ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
(PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
PARTITION sales_east FOR VALUES IN ('Bejing', 'Delhi', 'Vladivostok'),
PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Kyiv'));
-- ERROR: new partitions not have value 'Kyiv' but split partition has
ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
(PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
PARTITION sales_east FOR VALUES IN ('Bejing', 'Delhi', 'Vladivostok'),
PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', NULL));
DROP TABLE sales_list;
--
-- Test: BY LIST partitioning, SPLIT PARTITION with data
--
CREATE TABLE sales_list
(salesman_id SERIAL,
salesman_name VARCHAR(30),
sales_state VARCHAR(20),
sales_amount INT,
sales_date DATE)
PARTITION BY LIST (sales_state);
CREATE INDEX sales_list_salesman_name_idx ON sales_list USING btree (salesman_name);
CREATE INDEX sales_list_sales_state_idx ON sales_list USING btree (sales_state);
CREATE TABLE sales_nord PARTITION OF sales_list FOR VALUES IN ('Helsinki', 'St. Petersburg', 'Oslo');
CREATE TABLE sales_all PARTITION OF sales_list FOR VALUES IN ('Warsaw', 'Lisbon', 'New York', 'Madrid', 'Bejing', 'Berlin', 'Delhi', 'Kyiv', 'Vladivostok');
CREATE TABLE sales_others PARTITION OF sales_list DEFAULT;
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('Trump', 'Bejing', 1000, '2022-03-01');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('Smirnoff', 'New York', 500, '2022-03-03');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('Ford', 'St. Petersburg', 2000, '2022-03-05');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('Ivanov', 'Warsaw', 750, '2022-03-04');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('Deev', 'Lisbon', 250, '2022-03-07');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('Poirot', 'Berlin', 1000, '2022-03-01');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('May', 'Oslo', 1200, '2022-03-06');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('Li', 'Vladivostok', 1150, '2022-03-09');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('May', 'Oslo', 1200, '2022-03-11');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('Halder', 'Helsinki', 800, '2022-03-02');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('Muller', 'Madrid', 650, '2022-03-05');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('Smith', 'Kyiv', 350, '2022-03-10');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('Gandi', 'Warsaw', 150, '2022-03-08');
INSERT INTO sales_list (salesman_name, sales_state, sales_amount, sales_date) VALUES ('Plato', 'Lisbon', 950, '2022-03-05');
ALTER TABLE sales_list SPLIT PARTITION sales_all INTO
(PARTITION sales_west FOR VALUES IN ('Lisbon', 'New York', 'Madrid'),
PARTITION sales_east FOR VALUES IN ('Bejing', 'Delhi', 'Vladivostok'),
PARTITION sales_central FOR VALUES IN ('Warsaw', 'Berlin', 'Kyiv'));
SELECT * FROM sales_list;
SELECT * FROM sales_west;
SELECT * FROM sales_east;
SELECT * FROM sales_nord;
SELECT * FROM sales_central;
-- Use indexscan for test indexes after split partition
SET enable_indexscan = ON;
SET enable_seqscan = OFF;
SELECT * FROM sales_central WHERE sales_state = 'Warsaw';
SELECT * FROM sales_list WHERE sales_state = 'Warsaw';
SELECT * FROM sales_list WHERE salesman_name = 'Ivanov';
SET enable_indexscan = ON;
SET enable_seqscan = ON;
DROP TABLE sales_list;
--
-- Test for:
-- * split DEFAULT partition to partitions with spaces between bounds;
-- * random order of partitions in SPLIT PARTITION command.
--
CREATE TABLE sales_range (salesman_id INT, salesman_name VARCHAR(30), sales_amount INT, sales_date DATE) PARTITION BY RANGE (sales_date);
CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
INSERT INTO sales_range VALUES (1, 'May', 1000, '2022-01-31');
INSERT INTO sales_range VALUES (2, 'Smirnoff', 500, '2022-02-09');
INSERT INTO sales_range VALUES (3, 'Ford', 2000, '2022-04-30');
INSERT INTO sales_range VALUES (4, 'Ivanov', 750, '2022-04-13');
INSERT INTO sales_range VALUES (5, 'Deev', 250, '2022-04-07');
INSERT INTO sales_range VALUES (6, 'Poirot', 150, '2022-02-07');
INSERT INTO sales_range VALUES (7, 'Li', 175, '2022-03-08');
INSERT INTO sales_range VALUES (8, 'Ericsson', 185, '2022-02-23');
INSERT INTO sales_range VALUES (9, 'Muller', 250, '2022-03-11');
INSERT INTO sales_range VALUES (10, 'Halder', 350, '2022-01-28');
INSERT INTO sales_range VALUES (11, 'Trump', 380, '2022-04-06');
INSERT INTO sales_range VALUES (12, 'Plato', 350, '2022-03-19');
INSERT INTO sales_range VALUES (13, 'Gandi', 377, '2022-01-09');
INSERT INTO sales_range VALUES (14, 'Smith', 510, '2022-05-04');
ALTER TABLE sales_range SPLIT PARTITION sales_others INTO
(PARTITION sales_others DEFAULT,
PARTITION sales_mar2022_1decade FOR VALUES FROM ('2022-03-01') TO ('2022-03-10'),
PARTITION sales_jan2022_1decade FOR VALUES FROM ('2022-01-01') TO ('2022-01-10'),
PARTITION sales_feb2022_1decade FOR VALUES FROM ('2022-02-01') TO ('2022-02-10'),
PARTITION sales_apr2022_1decade FOR VALUES FROM ('2022-04-01') TO ('2022-04-10'));
SELECT * FROM sales_jan2022_1decade;
SELECT * FROM sales_feb2022_1decade;
SELECT * FROM sales_mar2022_1decade;
SELECT * FROM sales_apr2022_1decade;
SELECT * FROM sales_others;
DROP TABLE sales_range;
--
-- Test for:
-- * split non-DEFAULT partition to partitions with spaces between bounds;
-- * random order of partitions in SPLIT PARTITION command.
--
CREATE TABLE sales_range (salesman_id INT, salesman_name VARCHAR(30), sales_amount INT, sales_date DATE) PARTITION BY RANGE (sales_date);
CREATE TABLE sales_all PARTITION OF sales_range FOR VALUES FROM ('2022-01-01') TO ('2022-05-01');
CREATE TABLE sales_others PARTITION OF sales_range DEFAULT;
INSERT INTO sales_range VALUES (1, 'May', 1000, '2022-01-31');
INSERT INTO sales_range VALUES (2, 'Smirnoff', 500, '2022-02-09');
INSERT INTO sales_range VALUES (3, 'Ford', 2000, '2022-04-30');
INSERT INTO sales_range VALUES (4, 'Ivanov', 750, '2022-04-13');
INSERT INTO sales_range VALUES (5, 'Deev', 250, '2022-04-07');
INSERT INTO sales_range VALUES (6, 'Poirot', 150, '2022-02-07');
INSERT INTO sales_range VALUES (7, 'Li', 175, '2022-03-08');
INSERT INTO sales_range VALUES (8, 'Ericsson', 185, '2022-02-23');
INSERT INTO sales_range VALUES (9, 'Muller', 250, '2022-03-11');
INSERT INTO sales_range VALUES (10, 'Halder', 350, '2022-01-28');
INSERT INTO sales_range VALUES (11, 'Trump', 380, '2022-04-06');
INSERT INTO sales_range VALUES (12, 'Plato', 350, '2022-03-19');
INSERT INTO sales_range VALUES (13, 'Gandi', 377, '2022-01-09');
INSERT INTO sales_range VALUES (14, 'Smith', 510, '2022-05-04');
ALTER TABLE sales_range SPLIT PARTITION sales_all INTO
(PARTITION sales_mar2022_1decade FOR VALUES FROM ('2022-03-01') TO ('2022-03-10'),
PARTITION sales_jan2022_1decade FOR VALUES FROM ('2022-01-01') TO ('2022-01-10'),
PARTITION sales_feb2022_1decade FOR VALUES FROM ('2022-02-01') TO ('2022-02-10'),
PARTITION sales_apr2022_1decade FOR VALUES FROM ('2022-04-01') TO ('2022-04-10'));
SELECT * FROM sales_jan2022_1decade;
SELECT * FROM sales_feb2022_1decade;
SELECT * FROM sales_mar2022_1decade;
SELECT * FROM sales_apr2022_1decade;
SELECT * FROM sales_others;
DROP TABLE sales_range;
--
-- Test for split non-DEFAULT partition to DEFAULT partition + partitions
-- with spaces between bounds.
--
CREATE TABLE sales_range (salesman_id INT, salesman_name VARCHAR(30), sales_amount INT, sales_date DATE) PARTITION BY RANGE (sales_date);
CREATE TABLE sales_jan2022 PARTITION OF sales_range FOR VALUES FROM ('2022-01-01') TO ('2022-02-01');
CREATE TABLE sales_all PARTITION OF sales_range FOR VALUES FROM ('2022-02-01') TO ('2022-05-01');
INSERT INTO sales_range VALUES (1, 'May', 1000, '2022-01-31');
INSERT INTO sales_range VALUES (2, 'Smirnoff', 500, '2022-02-10');
INSERT INTO sales_range VALUES (3, 'Ford', 2000, '2022-04-30');
INSERT INTO sales_range VALUES (4, 'Ivanov', 750, '2022-04-13');
INSERT INTO sales_range VALUES (5, 'Deev', 250, '2022-04-07');
INSERT INTO sales_range VALUES (6, 'Poirot', 150, '2022-02-11');
INSERT INTO sales_range VALUES (7, 'Li', 175, '2022-03-08');
INSERT INTO sales_range VALUES (8, 'Ericsson', 185, '2022-02-23');
INSERT INTO sales_range VALUES (9, 'Muller', 250, '2022-03-11');
INSERT INTO sales_range VALUES (10, 'Halder', 350, '2022-01-28');
INSERT INTO sales_range VALUES (11, 'Trump', 380, '2022-04-06');
INSERT INTO sales_range VALUES (12, 'Plato', 350, '2022-03-19');
INSERT INTO sales_range VALUES (13, 'Gandi', 377, '2022-01-09');
ALTER TABLE sales_range SPLIT PARTITION sales_all INTO
(PARTITION sales_apr2022 FOR VALUES FROM ('2022-04-01') TO ('2022-05-01'),
PARTITION sales_feb2022 FOR VALUES FROM ('2022-02-01') TO ('2022-03-01'),
PARTITION sales_others DEFAULT);
INSERT INTO sales_range VALUES (14, 'Smith', 510, '2022-05-04');
SELECT * FROM sales_range;
SELECT * FROM sales_jan2022;
SELECT * FROM sales_feb2022;
SELECT * FROM sales_apr2022;
SELECT * FROM sales_others;
DROP TABLE sales_range;
--
DROP SCHEMA partition_split_schema;

1
src/tools/pgindent/typedefs.list
View File

@ -2695,6 +2695,7 @@ SpecialJoinInfo
SpinDelayStatus
SplitInterval
SplitLR
SplitPartitionContext
SplitPageLayout
SplitPoint
SplitTextOutputData